User:DannyCaes/AstronomicalNomenclature

Thanks User:Agerskov

Names and Nicknames of astronomical objects beyond the solar system
This gradually expanding A.B.C.-list is an experiment, to see if it's possible to create a Wikipedia article for the nomenclature of astronomical objects beyond the solar system (stars, planets of other suns than ours, clusters of stars, nebulae, deep-sky objects (galaxies), clusters of galaxies, difficult-to-comprehend superstructures in the universe such as filaments and voids). The second half of this alphabetic list (N to Z) should appear somewhere in the year 2024 (I hope). Every now and then I try to work on it. The problem is: TIME (there's not much of it, read: there's much occupied time, almost no free time).

This list does not contain the starnames from pre-telescopic times, such as (for example): Betelgeuze (Alpha Orionis). All starnames in this list are from the era of the telescope (optical and radio telescopes), such as (for example): Becklin's star (IRC 10093 in Orion). This alphabetic list is a continuation of the Glossary of Selected Astronomical Names in Sky Catalogue 2000.0, Volume 2: Double Stars, Variable Stars, and Nonstellar Objects (edited by Alan Hirshfeld and Roger W. Sinnott, 1985), and also Deep-Sky Name Index 2000.0 (Hugh C. Maddocks, Foxon-Maddocks Associates, 1991).

A

 * "A" asterism (Weisman 1, a telescopic asterism in Sextans)
 * AB Doradus moving group
 * Abell, the (the most distant galaxy ever observed?) (Abell 1835 IR 1916, Virgo)
 * Abol (a planet of the star HD 16175, aka Buna, in Andromeda)
 * Absolutno (the star XO 5 in Lynx, with the planet Makropulos)
 * Abt's star (HD 98088, Crater)
 * a Carinae cluster (open star cluster Platais 8 in Carina)
 * Acervus Adspectu Jucundissimus (globular star cluster Messier 92 in Hercules, thus named or described by Heinrich d'Arrest, see T.W.Webb's Celestial Objects for Common Telescopes, Volume 2: The Stars, page 144).
 * Acheron stream (a stream of stars related to our own galaxy)
 * A cote de Ferrero 8 (Ferrero 53, a telescopic asterism in Perseus)
 * Adam's apple (possibly related to Reiland's object)
 * Admodum Luminosa (d'Arrest's name for the galaxy NGC 3166 in Sextans, aka Cross Eyed Galaxy)
 * AE Aurigae Nebula (IC 405, aka Flaming Star Nebula)
 * Aegir (a planet of the star Ran, aka Epsilon Eridani)
 * Agouto (a planet of the star Atakoraka, aka WASP 64)
 * Ahra (a planet of the star Maru, in Volans)
 * Aiolos (the star HD 95086, with the planet Levantes, in Carina)
 * Air balloon (an asterism in Piscis Austrinus, Globus Aerostaticus?)
 * Airplane (a telescopic asterism in Cassiopeia, aka Arrow cluster)
 * Akira (a red-colored elliptical galaxy in Lynx, see also: Tetsuo)
 * Alasia (the star HD 168746 in Serpens Cauda, with the planet Onasilos)
 * Albino Butterfly Nebula (planetary nebula NGC 2440 in Puppis, aka Burning Amber Nebula, see also: Bat Nebula)
 * Albmi (a planet of the star Nasti, aka HD 68988, in Ursa Major)
 * Alcyone nebula (near the star Alcyone in open star cluster Messier 45 - Pleiades, in Taurus)
 * Alcyoneus (SDSS J081421.68+522410.0, in Lynx)
 * Alef (a planet of the star Tevel in Auriga, aka HAT P9)
 * (SN) Alexander (a supernova in galaxycluster RXC J0949.8+1707, aka ZwCI 0947+1723)
 * Allan Green's cluster (open star cluster Tomm Lorenzin 14 in Canis Major)
 * Alligator (open star cluster NGC 1981 in Orion, aka Crocodile)
 * Ally's braid (a telescopic asterism in open star cluster Messier 45 - Pleiades, in Taurus)
 * Alpha Gruis galaxy (NGC 7213 in Grus)
 * Alpha Persei cluster (open star cluster Melotte 20 in Perseus)
 * Al Sufi's cluster (binocular friendly asterism Collinder 399 in Vulpecula, aka The Coathanger, Brocchi's cluster)
 * Alter cluster (open star cluster Alter 1 in Cassiopeia, aka King 14)
 * Amadioha (the star HD 43197 in Canis Major, with the planet Equiano)
 * Amansinaya (the star WASP 34 in Crater, with the planet Haik)
 * Amateru (a planet of the star Ain, aka 74 Tauri/Epsilon Tauri, Oculus Borealis, Coronis)
 * Ambartsumian's knot (galaxy NGC 3561C in Ursa Major, aka Guitar)
 * Amphitheatre (IC 2966 in Musca)
 * Anadolu (the star WASP 52 in Pegasus, with planet Göktürk)
 * Añañuca (the star Gliese 367 in Vela, with planet Tahay)
 * Ana's object (seems to be a galaxy in Draco, there's not much known about it, I detected this name in the nomenclature list of CLEAR SKIES)
 * Anchor (telescopic asterism and open star cluster Dolidze-Dzimselejsvili 5 in Hercules)
 * Andrews's star (a suspected variable star in Auriga)
 * Andromeda I, II, III, IV, V, VI, VII, VIII, IX, X (local group galaxies in Andromeda)
 * Andromeda galaxy (Messier 31, aka Azophi's/Al Sufi's Little Cloud)(note: Belgian astronomer Gerard Bodifee want to call Messier 31 Propinquus Andromedae)
 * Andromeda's Cluster (globular star cluster Mayall II, very near Messier 31 in Andromeda)
 * Andromeda's parachute (a quadrupuly lensed quasar in Andromeda, aka Chained Princess's Drogue)
 * Angelfish Cluster (globular star cluster Messier 71 in Sagitta, aka Arrowhead Cluster)
 * Angelfish nebula (Sharpless 2-264 in Orion, aka Lambda Orionis Ring, Lambda Orionis Nebula, Orion Molecular Cloud Complex - OMCC)
 * Angel nebula (NGC 2170 in Monoceros)
 * Angel Nebula (Mandel-Wilson 2, MW 2, in Draco)(an Integrated Flux Nebula, IFN)
 * Angelo's Nebula (Martino-Sainty Object 1, in Camelopardalis)(source: ASTROBIN)
 * Aniara (the star HD 102956 in Ursa Major, with planet Isagel)
 * Animal Track Nebula (Mandel-Wilson 4, MW 4, in Ursa Major)(an integrated flux nebula, IFN)
 * Annular in Orion (planetary nebula NGC 2022 in Orion, aka Kissing Crescents Nebula, Orion's Collarbone Nebula)
 * Annular nebula (planetary nebula Henize 2-58 in Carina, AG Carinae?)
 * Anon Platais (open star cluster Platais 1 in Cygnus, of which V 1726 is its brightest member)
 * Anonymous VdB cluster (open star cluster known as the CV Monocerotis cluster)
 * Antares cluster (open star cluster Collinder 302 in Scorpius)
 * Antares nebula (Cederblad 132 in Scorpius, aka Cloud nebula, IC 4606)
 * Ant-eater nebula (NGC 6726 in Corona Australis)
 * Antennae galaxies (NGC 4038/4039 in Corvus, aka Ring Tail Galaxy, Snorter, Comma, Pupa, Mosquito Larva)
 * Ant galaxy (UGC 6046 in Leo, aka The Ant)
 * Anthelm's nova (Nova Vulpeculae 1670, aka Anthelm's star, 11 Vulpeculae, CK Vulpeculae)
 * Anticenter shell (aka Anticenter superbubble, Snickers)
 * Anticenter stream (a defunct dwarf galaxy)
 * Anticenter superbubble (aka Anticenter shell, Snickers)
 * (SN)Antikythera (a supernova in an extragalactic system of galaxycluster RXC J0949.8+1707, aka ZwCI 0947+1723, in Leo)
 * Antlia 2 Dwarf Galaxy (near Epsilon Antliae, as seen from planet Earth)
 * Antlia cluster (cluster of galaxies Abell S0636 in Antlia)
 * Antlia Cluster Galaxies (NGC 3271)
 * Antlia dwarf (dwarf galaxy PGC 29194 in Antlia)
 * Antlia-Sextans group (a small grouping of galaxies in Antlia, Hydra, Leo, and Sextans)
 * Antlia wall (see also: Hydra-Centaurus supercluster)
 * Ant nebula (planetary nebula RCW 102 in Norma, aka MZ 3, He2-154, PK-331-1.1)
 * Ape man nebula (NGC 2174/2175 in Orion, aka Monkey head nebula)(this seems to be Bruhn's only NGC-related discovery, according to Wolfgang Steinicke's research)
 * Apep (triple star system WR 70-16 in Norma, aka 2MASSJ16005047-5142449)
 * Apex Cloud (an interstellar cloud, aka AC)
 * Apple (planetary nebula Brand 100, aka Manzana nebula)
 * Apple core nebula (planetary nebula Messier 27 in Vulpecula, aka Dumbbell nebula, Double headed shot)
 * Apriamashvili cluster (open star cluster Basel 1 in Scutum)
 * Aquarius B supercluster (a supercluster of galaxies)
 * Aquarius-Capricornus supercluster (a supercluster of galaxies)
 * Aquarius-Cetus supercluster (a supercluster of galaxies)
 * Aquarius dwarf (dwarf galaxy DDO 210, aka AqrDIG, PGC 65367)
 * Aquarius stream (a defunct dwarf galaxy)
 * Aquarius supercluster (a supercluster of galaxies)
 * Aquila rift (a complex of dark dust clouds in the milky way, aka Aquila-Serpens rift)
 * Aquila supershell
 * Ara cluster (open star cluster Westerlund 1, in Ara)
 * Ara OB 1 association
 * Arber (a planet of the star HD 82886 in Leo Minor, aka Illyrian)
 * Arc (a feature at the center of our galaxy)
 * Arcalis (the star HD 131496 in Bootes, with planet Madriu)
 * Arches cluster (an open star cluster near the center of our galaxy, in Sagittarius)
 * Arcturus group (a telescopic asterism in Bootes, probably Picot 1, aka Napoleon's hat)
 * Arcturus moving group (a stellar stream or defunct dwarf galaxy, aka Arcturus stream)
 * Arcturus stream (see: Arcturus moving group)
 * Argelander's second star (Lalande 21185 in Ursa Major)
 * Argelander's star (Groombridge 1830 in Ursa Major)
 * Argo dwarf (dwarf galaxy Carina II)
 * Argus association (see: open star cluster IC 2391, aka Omicron Velorum cluster)
 * Arion (a planet of star Musica, aka 18 Delphini)
 * Arkas (a planet of star Intercrus, aka 41 Lyncis)
 * Arkenstone (open star cluster NGC 2362 in Canis Major, aka Mexican jumping star, Tau Canis Majoris cluster)
 * Armoured motor car (galaxies NGC 3356 and PGC 3468050 in Leo)
 * Arp's galaxy (compact dwarf galaxy PGC 34658 in Ursa Major)
 * Arp's loop (see: galaxy Messier 81 in Ursa Major)
 * Arrow, the (galaxy NGC 7090 in Indus)
 * Arrowchain (telescopic asterism Tomm Lorenzin 4 in Sagitta, aka Ramakers 56)
 * Arrow cluster (a telescopic asterism in Cassiopeia, aka Airplane)
 * Arrowhead (a telescopic asterism in Canis Major, aka Harrington 5, Unicorn's horn, La pointe de flèche)
 * Arrowhead cluster (globular star cluster Messier 71 in Sagitta, aka Angelfish cluster)
 * Arrowhead cluster (open star cluster NGC 7510 in Cepheus, aka Dormouse cluster)
 * Ascot (or A.S.C.O.T.?) (a diffuse nebula in Cygnus)
 * Asphalt path (dark dust cloud Barnard 168 in Cygnus, aka Caterpillar, Tomm Lorenzin 12)
 * Assymetrical butterfly (planetary nebula NGC 2899 in Vela, aka Flying jaw nebula)
 * Astrolabos (a planet of the star Gnomon in Sextans)
 * Asye (a planet of the star Nyamien, aka WASP 15, in Centaurus)
 * Atakoraka (the star WASP 64 in Canis Major, with planet Agouto)
 * Atlas nebula (a nebula around the star Atlas in Messier 45 - Pleiades)
 * Atoms for peace (galaxy NGC 7252 in Aquarius)
 * Aumatex (a planet of the star Koeia, aka HIP 12961, in Eridanus)
 * Auriga salt-and-pepper (open star cluster Messier 37 in Auriga, aka January salt-and-pepper)
 * Auris nebula (Patchick-Strottner-Drechsler 4, PaStDr 4, in Triangulum Australe) (source: ASTROBIN)
 * Aurore's nebula (possible planetary nebula Strottner-Drechsler 20, StDr 20, in Puppis) (source: ASTROBIN)
 * Austral complex (Chamaeleon's dark clouds, aka Chamaeleon I, II, III)
 * Awasis (a planet of the star Nikawiy, aka HD 136418, in Bootes)
 * Awohali (a planet of the star Noquisi, aka Gliese 436, in Leo)
 * Axólotl (the star HD 224693 in Cetus, with planet Xólotl)
 * Ayeyarwadi (the star HD 18742 in Eridanus, with planet Bagan)
 * Azure nebula (Strottner-Drechsler object 33, aka PNG 110.2+07.9) (source: ASTROBIN)

B

 * "Baade" (globular star cluster Abel 5, aka Palomar 5, in Serpens Cauda)
 * Baade A + B (galaxies in Andromeda)
 * Baade's star (the pulsar in the Crab nebula in Taurus, aka Crab pulsar, Messier 1)
 * Baade's windows (low absorption regions near globular cluster NGC 6522 in Sagittarius, aka Sagittarius I and Sagittarius II)
 * Babcock's magnetic star (GL Lacertae, HD 215441)
 * Baby boom galaxy (in Sextans)
 * Baby dumbbell nebula (planetary nebula Humason 1-2, aka Perek-Kohoutek 86-8.1, in Cygnus)
 * Baby eagle nebula (Struve-Straka 13, in Taurus) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Baby homunculus (shell of shocked material near the Homunculus nebula in the Eta Carinae nebula)
 * Baby Inuit nebula (planetary nebula IC 3568 in Camelopardalis, aka Lemon slice nebula, Theoretician's planetary) (seems to be Aitken's one and only IC-related discovery, should be named Aitken's planetary)
 * Babylonia (a planet of the star Uruk in Sagitta, aka HD 231701)
 * Baby nebula (aka Soul nebula, in Cassiopeia)
 * Baby Orion nebula (NGC 1931 in Auriga, aka Fly nebula)
 * Baby scorpion (open star cluster NGC 6231 in Scorpius)
 * Backward galaxy (NGC 4622 in Centaurus)
 * Backwards '5' (a telescopic asterism in Hercules) (T.W.Webb's Recurved line of small stars, Harrington's STAR 23)
 * Baekdu (the star 8 Ursae Minoris, with planet Halla)
 * Bagan (a planet of the star Ayeyarwady, aka HD 18742 in Eridanus)
 * Bahcall & Soneiro 1982 void
 * Baidurí (a planet of the star Intan, aka HD 20868 in Fornax)
 * Bajamar star (the ionising star J205551.3+435225 in Cygnus)
 * Balbinot 1 (a low luminosity globular cluster in Pegasus, one of the faintest globular clusters known)
 * Ball (open star cluster NGC 752 in Andromeda, very near the telescopic asterism Golf putter)
 * Bambaruush (a planet of the star Mazaalai in Ursa Major, aka HAT P 21)
 * Banana (nebula NGC 3199 in Carina, aka Valentine nebula, Smily nebula)
 * Banksia (a planet of the star Wattle, in Vela)
 * Barajeel (a planet of the star Sharjah in Scorpius, aka HIP 79431)
 * Barbell nebula (planetary nebula Messier 76 in Perseus, aka Little dumbbell nebula, Butterfly nebula, Cork nebula)
 * Barbeque fork (a telescopic asterism in Taurus, aka Spermatozoon, Tomm Lorenzin 1)
 * Barbon's galaxy (Markarian 328 / PGC 71938 in Pegasus)
 * Bärenstein nebula (Patchick-Strottner-Drechsler 8, PaStDr 8, in Sagittarius) (source: ASTROBIN)
 * Barnard's E nebula (dark dust clouds Barnard 142 and Barnard 143 in Aquila, aka Triple cave)
 * Barnard's galaxy (NGC 6822 in Sagittarius)
 * Barnard's loop (supernova remnant Sharpless 2-276 in Orion)
 * Barnard's Merope nebula (IC 349 in Messier 45, the Pleiades, in Taurus)
 * Barnard's 'S' nebula (dark dust cloud Barnard 72 in Ophiuchus, aka Snake nebula)
 * Barnard's star (Munich 15040, a runaway star in Ophiuchus, aka Velox Barnardi, in the non-IAU constellation Taurus Poniatovii)
 * Baseball diamond (a telescopic asterism in Cygnus, containing the star Espin 202)
 * Bat nebula (planetary nebula NGC 2440 in Puppis, aka Albino butterfly nebula, Burning amber nebula) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Bat nebula (NGC 6995, a section of the Veil nebula in Cygnus, aka Claw)
 * Batsu (a star in Indus, with planet Kua'kua)
 * Bat symbol nebula (planetary nebula Abell 36, aka PK 318+41.1, in Virgo) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Baxendell's unphotographable nebula (the non-existing object "NGC 7088" in Aquarius)
 * Bay area nebula (Mandel-Wilson 6, MW 6, in Camelopardalis) (Integrated Flux Nebula, IFN)
 * Bean nebula (N11 / LMC - N11 in Dorado and the Large Magellanic Cloud)
 * Bear claw galaxy (NGC 2537 in Lynx, aka Bear paw galaxy)
 * Bear claw nebula (Sharpless 2-200 in Cassiopeia) (source: ASTROBIN)
 * Bear claw nebula (NGC 6334 in Scorpius, aka Cat's paw nebula)
 * Bear paw galaxy (NGC 2537 in Lynx, aka Bear claw galaxy)
 * Beautiful star clouds, the (NGC 1837 / NGC 1845 in Dorado and the Large Magellanic Cloud)
 * Becklin-Neugebauer object (an infrared object near Becklin's star in Messier 42, the Orion nebula)
 * Becklin's star (IRC 10093 in Messier 42, the Orion nebula)
 * Bedin I (a dwarf spheroidal galaxy behind globular star cluster NGC 6752 in Pavo)
 * Beehive cluster (open star cluster Messier 44 in Cancer, aka Praesepe, Manger)
 * Beehive galaxies (as seen from planet Earth, all of them located "in", or rather: behind, the open star cluster Messier 44, aka Beehive cluster)
 * Beehive nebula (possible planetary nebula Strottner-Drechsler 47, StDr 47, in Hydra) (source: ASTROBIN)
 * Beirut (a planet of the star Phoenicia in Aquila, aka HD 192263)
 * Belel (the star HD 181342 in Sagittarius, with planet Dopere)
 * Bélénos (the star HD 8574 in Pisces, with planet Bélisama)
 * Bélisama (a planet of the star Bélénos in Pisces, aka HD 8574)
 * Bellerophon (the former name of the planet Dimidium in Pegasus, of which its sun/star is Helvetios, aka 51 Pegasi)
 * Bellissima (Father Angelo Secchi's name for the star Delta Virginis, aka Minelauva)
 * Bendida (a planet of the star Tangra in Pegasus, aka WASP 21)
 * Benedict's galaxy (NGC 4314 in Coma Berenices) (source: list of astronomical nomenclature in CLEAR SKIES) (but... who is, or was, Benedict?)
 * Berehynia (the star HAT P 15 in Perseus, with planet Tryzub)
 * Bessel's star (61 Cygni, aka Piazzi's flying star)
 * Beta Pictoris moving group
 * Bibhã (the star HD 86081 in Sextans, with planet Santamasa)
 * BID (some sort of "name" for the planetary nebula PK 358-1.1 in Scorpius) (needs research to know the meaning of "BID")
 * Bidelman's helium variable star (V 761 Centauri, aka HD 125823)
 * Bidelman's peculiar star (KS Persei, aka HD 30353)
 * Bidelman's star (HD 127617 in Bootes, aka Bidelman's high-altitude Be-star)
 * B.I.D.Z. 1 (a planetary nebula in Centaurus) (needs research to know the meaning of "B.I.D.Z") (source: Peter Marples)
 * Binary pulsar (aka the Hulse-Taylor binary, in Aquila)
 * Bipolar nebula (planetary nebula NGC 6302 in Scorpius, aka Bug nebula, Butterfly nebula)
 * Bipolar planetary (planetary nebula NGC 2346 in Monoceros, aka Butterfly)
 * Bird (PGC 62946, ESO 593-8, interacting galaxies in Sagittarius, aka Tinkerbell triplet, Cosmic Tinkerbell)
 * Bird's head galaxy (NGC 6745 in Lyra) (source: list of astronomical nomenclature in CLEAR SKIES)(and also: ASTROBIN)
 * Bird's nest (dark cloud Barnard 353 in the North America nebula, in Cygnus) (source: ASTROBIN)
 * Black arrow cluster (open star cluster NGC 3532 in Carina, aka Double arrowhead, Football cluster, Firefly party cluster, Pincushion cluster, Wishing well cluster) (this is one of the examples of multiple nomenclature in astronomy)
 * Black eye galaxy (Messier 64 / NGC 4826 in Coma Berenices, aka Sleeping beauty galaxy, Evil eye galaxy) (seems to be Pigott's one and only NGC-related discovery)
 * Black eye nebula (NGC 1999 + Herbig-Haro 1 & 2 in Orion, aka Keyhole nebula, 13th pearl nebula, Rubber stamp nebula) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Black hole in Sagittarius (dark dust cloud Barnard 92)
 * Black manta (dark dust cloud Barnard 312 in Scutum) (source: ASTROBIN)
 * Black python (dark dust cloud 301.0-08.6 in Musca, aka Dark doodad) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Black swan (open star cluster Messier 18 in Sagittarius) (source: list of astronomical nomenclature in CLEAR SKIES) (but... why "black swan"?)
 * Black widow (complex of dark nebulae in Cygnus) (source: ASTROBIN)
 * Black widow pulsar (an eclipsing binary millisecond pulsar in Sagitta, aka PSR B 1957+20)
 * Black widow nebula (in Circinus) (needs research to know more about it, catalog number etcetera...)
 * Black widow spider (telescopic asterism Lederman 1 in Andromeda)
 * Blade and pearl galaxy (NGC 5746 in Virgo, aka Double hub galaxy) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Blanco 1 (an open star cluster in Sculptor, aka Zeta Sculptoris cluster)
 * Blaze star (T Coronae Borealis)
 * Blinking eye nebula (planetary nebula NGC 6826 in Cygnus, aka Blinking planetary)
 * Blinking galaxy (NGC 6118 in Serpens Caput) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Blinking planetary (NGC 6826 in Cygnus, aka Blinking eye nebula)
 * Blob, the (Henize 2-105 in Apus)
 * Blucher (a 10th magnitude star in Ursa Minor, nearest to the north celestial pole in 1843)
 * Blue crescent (supernova remnant SNR G288.7-6.3 in Carina) (source: ASTROBIN)
 * Blue dolphin (WR 134 in Cygnus) (source: ASTROBIN)
 * Blue flash (planetary nebula NGC 6905 in Delphinus)
 * Blue horsehead nebula (IC 4592 in Scorpius)
 * Blue ice cube nebula (possible planetary nebula Strottner-Drechsler 127, StDr 127, in Centaurus) (aka PNG 298.2+18.2) (source: ASTROBIN)
 * Blue nebula (planetary nebula NGC 3918 in Centaurus, aka The southerner, Blue planetary, Ghost of Uranus)
 * Blue planetary (NGC 3918 in Centaurus, aka The Southerner, Ghost of Uranus, Blue nebula)
 * Blue racketball (planetary nebula NGC 6572 in Ophiuchus, aka Emerald nebula, Green nebula, Turquoise orb)
 * Blue sausage (galaxy MCG+10-22-009 in Draco) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Blue snowball (planetary nebula NGC 7662 in Andromeda)
 * Blue sprites (supernova remnant SNR G013.3-01.3 in Sagittarius) (source: ASTROBIN)
 * Blue wedge (a telescopic asterism in Centaurus, aka Tomm Lorenzin 13)
 * Bocaprins (a planet of the star Malmok in Virgo, aka WASP 39)
 * Bode's "nebulae" (galaxies Messier 81, Messier 82 (Dove galaxy), NGC 3031, NGC 3034, Ursa Major A)
 * Boinayel (a planet of the star Márohu in Aquarius, aka WASP 6)
 * Bok's valentine (ESO 210-6A in Vela)
 * Bold arrow cluster (open star cluster NGC 2439 in Puppis)
 * Bond's flare star (V 3885 in Sagittarius)
 * Bonfire nebula (a Ha emission region in Cygnus) (source: ASTROBIN)
 * Boogeyman nebula (Lynds Dark Nebula 1622, LDN 1622, in Orion)
 * Boomerang nebula (a protoplanetary nebula in Centaurus, aka ESO 172-7, Bow-tie nebula, Centaurus bipolar nebula)
 * Bootes A supercluster (a supercluster of galaxies)
 * Bootes cluster (a cluster of galaxies)
 * Bootes dwarf galaxy (aka Bootes I, Boo I dSph, Bootes satellite, Bootes dwarf spheroidal galaxy, PGC 4713553)
 * Bootes supercluster (supercluster of galaxies SCI 138)
 * Bootes III stream (a stream of stars near our galaxy, aka Styx stream)
 * Bootes void (an enormous void in the direction of the constellation Bootes, aka The great nothing, sometimes erroneously confused with dark dust cloud Barnard 68)
 * Borrelly's star (S Ceti ?)
 * Bosona (the star HD 206610 in Aquarius, with planet Naron)
 * Boss great wall (B.O.S.S. = Baryon Oscillation Spectroscopic Survey)
 * Bow and arrow galaxy (NGC 3310 / ARP 217 in Ursa Major) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Bow shock nebula (planetary nebula Sharpless 313 / Abell 35 / PK 303+40.1, in Hydra) (source: ASTROBIN and CLEAR SKIES)
 * Bow-tie (a telescopic asterism in Pavo, aka Tomm Lorenzin 21)
 * Bow-tie galaxy (NGC 7787 in Pisces) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Bow-tie nebula (planetary nebula NGC 40 in Cepheus, aka Scarab nebula)
 * Bow-tie nebula (planetary nebula NGC 2440 in Puppis, aka Ellipse, Albino butterfly nebula, Burning amber nebula)
 * Bow-tie nebula (a protoplanetary nebula in Centaurus, aka ESO 172-7, Boomerang nebula, Centaurus bipolar nebula)
 * Box (an asterism in Virgo)
 * Box galaxies (galaxygroup Hickson 61 in Coma Berenices: NGC 4169, NGC 4173, NGC 4174 and NGC 4175)
 * Box galaxy (NGC 4449 in Canes Venatici) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Box nebula (planetary nebula NGC 6309 in Ophiuchus, aka Exclamation mark nebula)
 * Box nebula (planetary nebula NGC 6445 in Sagittarius, aka Little gem, Crescent nebula, Coffin planetary, Crawling monster) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Boyajian's star (KIC 8462852 in Cygnus, aka Tabby's star, W.T.F. star = Where's The Flux? - star)
 * Brahe (a planet of the star Copernicus in Cancer, aka 55 Cancri)
 * Brain nebula (NGC 6888 in Cygnus, aka Crescent nebula, Ear nebula, Half Moon, Sharpless 2-105) (source: ASTROBIN)
 * Brain nebula (NGC 7538 in Cepheus, aka Northern lagoon nebula)
 * Bran (a planet of the star Tuiren in Canes Venatici, aka HAT P 36)
 * Branchett's object (a possible nova in Scutum)
 * Brasil nebula (supernova remnant N49 in the Large Magellanic Cloud, in Dorado)
 * Brendan Downs supernova (SN 1997DE in galaxy NGC 6769, in Pavo) (see also: Devil's mask)
 * Brewer's star (magnetic star HD 50169 in Monoceros)
 * Brick, the (very near or at the center of our galaxy, in Sagittarius)
 * Bridal veil nebula (NGC 6960, NGC 6992, NGC 6995 in Cygnus, aka Cirrus nebula, Cygnus loop, Veil nebula)
 * Bright bluish planetary (planetary nebula NGC 5307 in Centaurus)
 * Bright Vela galaxy (NGC 3256 in Vela)
 * Brocchi's cluster (the binocular friendly asterism Collinder 399 in Vulpecula, aka Al Sufi's cluster, Coathanger, 4-5 Vulpeculae cluster)
 * Broken engagement ring (a telescopic asterism in Ursa Major, aka Crown, Crown cluster, Seven arrows (?), Uniti Belgii (?))
 * Broken heart cluster (open star cluster NGC 2281 in Auriga, aka Floppy fish cluster) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Browning (galaxy IC 2431 in Cancer) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Bubble galaxy (NGC 3521 in Leo)
 * Bubblegum nebula (possible planetary nebula Patchick-Rasool-Mohan-Mishra 1, PaRasMoMi 1, in Monoceros) (source: ASTROBIN)
 * Bubble in Cetus (planetary nebula NGC 246, aka Cetus ring, Pacman nebula, Skull nebula)
 * Bubble nebula (NGC 7635 in Cassiopeia)
 * Bubup (the star HD 38283 in Mensa, with planet Yanyan)
 * Bucking horse (a telescopic asterism in Delphinus, aka Theta Delphini group, Harrington's STAR-9)
 * Bug nebula (planetary nebula NGC 6302 in Scorpius, aka Butterfly nebula)
 * Bullet cluster (colliding clusters of galaxies in Carina, aka 1E 0657-558)
 * Bullet galaxy (galaxy RXC J2359.3-6042 CC in Tucana)
 * Bullet group (a merging group of galaxies in Hydra, aka SL2S-J08544-0120)
 * Buna (the star HD 16175 in Andromeda, with planet Abol)
 * Bunsen burner (an asterism in Virgo)
 * Burbidge chain of galaxies (Vorontsov-Vel'yaminov 518 in Cetus)
 * Burçin's galaxy (a Hoag's object type of ring galaxy in Crater, aka LEDA 1000714, PGC 1000714)
 * Burnham's nebula (at the star T Tauri in Taurus)
 * Burnham's PM (the star Groombridge 1618 in Ursa Major) (PM = Proper Motion?)
 * Burning amber nebula (planetary nebula NGC 2440 in Puppis, aka Albino Butterfly nebula)
 * Buru (a planet of the star Kalausi in Vela, aka HD 83443)
 * Butler's star (BT Tucanae / HD 6090, a flare star in the Small Magellanic Cloud)
 * Butterfly (bipolar planetary nebula NGC 2346 in Monoceros, aka Hourglass, Butterfly wing nebula)
 * Butterfly (galaxy IC 708 in Ursa Major, aka Papillon galaxy) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Butterfly cluster (open star cluster Messier 6 in Scorpius)
 * Butterfly cluster (open star cluster Messier 93 in Puppis, aka Critter cluster) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Butterfly galaxies (NGC 4567 and NGC 4568 in Virgo, once called the Siamese twins) (is it also known as the Compass?)
 * Butterfly nebula (bipolar planetary nebula NGC 6302 in Scorpius, aka Bug nebula)
 * Butterfly nebula (IC 2220 in Carina, aka Toby jug nebula)
 * Butterfly nebula (IC 1318 in Cygnus, in the Gamma Cygni complex)
 * Butterfly nebula (M 2-9 in Ophiuchus, aka Siamese squid nebula, Twinjet nebula)
 * Butterfly nebula (planetary nebula Messier 76 in Perseus, aka Little dumbbell nebula, Barbell nebula, Cork nebula)
 * Butterfly wing nebula (planetary nebula NGC 2346 in Monoceros, aka Butterfly, Hourglass) (source: list of astronomical nomenclature in CLEAR SKIES)
 * Button hook (telescopic asterism Ramakers 45 in Scutum, aka Fish hook, J-string)
 * BW Tauri galaxy (U 3087 in Taurus)

C

 * Caelum supercluster (aka SCL 59, the largest known supercluster of galaxies)
 * Caffau's star (an ultra metal-poor halo star in Leo, aka SDSS J102915+172927)
 * Calabash nebula (a planetary nebula near NGC 2438 in Puppis, aka Rotten egg nebula, QX Puppis)
 * California nebula (NGC 1499 in Perseus, aka Dragon nebula)
 * Californietto nebula (Tomm Lorenzin 8 in Cassiopeia)
 * Calvera (an X-ray source in Ursa Minor)
 * Camel (a telescopic asterism in Hydra)
 * Campbell's "star" (planetary nebula PK 64+5.1 in Cygnus)
 * Canali (a telescopic asterism in Corvus, aka John Wagoner's Stargate)
 * Cancer cluster of galaxies
 * Candle and holder (telescopic asterism Chiravalle 1 in Hercules)
 * Cane (a telescopic asterism in Cygnus)
 * Canes Venatici I group (a group of galaxies in Canes Venatici, aka Messier 94 group, NGC 4736 group, LGG 291 - Lyons Groups of Galaxies 291)
 * Canes Venatici II group (a group of galaxies in Canes Venatici) (largest member: Messier 106)
 * Canes Venatici cloud
 * Canes Venatici supervoid
 * Canis Major dwarf (the closest satellite to our galaxy)
 * Canis Major dwarf galaxy (aka Canis Major overdensity, Monoceros ring)
 * Canis Major void
 * Cannonball pulsar (one of the fastest moving pulsars known, aka PSR J0002+6216, in Cassiopeia)
 * Capricorn dwarf system (globular star cluster Palomar 12 in Capricornus)
 * Capricornus void
 * Carafe galaxy (a member of the Carafe group of galaxies in Caelum)
 * Carafe group of galaxies (NGC 1595, NGC 1598, and the Carafe galaxy, in Caelum)
 * Carina association (aka Great Austral Young Association - GAYA)
 * Carina defiant finger (small Bok globule in Carina, aka Defiant finger)
 * Carina dwarf galaxy (aka Carina dwarf spheroidal galaxy, ESO 206-G20, PGC 19441)
 * Carina-near moving group
 * Carina nebula
 * Carina OB-1 / OB-2
 * Caroline's cluster (open star cluster NGC 2360 in Canis Major)
 * Caroline's rose (open star cluster NGC 7789 in Cassiopeia, aka White rose cluster)
 * Cartwheel galaxy (in Sculptor)
 * Casino group (telescopic asterism Tomm Lorenzin 16 in Puppis)
 * Casper the ghost (nebula Messier 78 in Orion)
 * Casque (a telescopic asterism in Pegasus)
 * Cassiopeia A (aka 3C 461)
 * Cassiopeia dwarf (dwarf spheroidal galaxy PGC 2807155, aka Andromeda VII, CAS dSph)
 * Castor cluster (aka IC 219n group)
 * Castor moving group
 * Caterpillar (a Bok globule in the Carina nebula)
 * Caterpillar nebula (dark dust cloud Barnard 168 in Cygnus)
 * Cat's eye nebula (planetary nebula NGC 6543 in Draco, aka Snail nebula, Sunflower nebula)
 * Cat's paw nebula (NGC 6334 in Scorpius, aka Bear claw nebula)
 * Cave nebula (Sharpless 2-155 in Cepheus)
 * Cayrel's star (BPS CS 31082-0001 in Cetus)
 * CBS eye (planetary nebula NGC 3242 in Hydra, aka Ghost of Jupiter, Jupiter nebula)
 * Celaeno nebula (a nebula at and near the star Celaeno in open star cluster Messier 45 - Pleiades)
 * Celestial snow angel (emission nebula Sharpless 2-106 in Cygnus)
 * Centaurus A galaxy (NGC 5128 in Centaurus, aka Hamburger)
 * Centaurus A / Messier 83 group (a galaxygroup in Centaurus, Hydra, and Virgo, aka LGG 344 - Lyons Groups of Galaxies 344)
 * Centaurus bipolar nebula (a protoplanetary nebula in Centaurus, aka ESO 172-7, Boomerang nebula, Bow tie nebula)
 * Centaurus chain of galaxies
 * Centaurus cluster of galaxies (Abell 3526)
 * Centaurus dark nebula (in Cederblad 122)
 * Centaurus wall
 * Cepheus flare molecular cloud complex
 * Cetus dwarf (dwarf spheroidal galaxy PGC 3097691)
 * Cetus group (galaxy group Holmberg 45, aka LGG 27 - Lyons Groups of Galaxies 27)
 * Cetus polar stream (a defunct dwarf galaxy)
 * Cetus ring (planetary nebula NGC 246, aka Bubble in Cetus, Pacman nebula, Skull nebula)
 * CfA Homunculus (CfA = Center for Astrophysics) (aka Stick man)
 * CfA2 great wall (CfA2 = Second survey, Center for Astrophysics, Red shift survey) (aka Coma wall)
 * Chained brooch (nebula NGC 2467 in Puppis)
 * Chain remote clusters (NGC 456, in the Large Magellanic Cloud - LMC, in Tucana)
 * Chamaeleon infrared nebula (aka Cha IRN)
 * Chamaeleon I molecular cloud
 * Chamaeleon 1 association
 * Chamaeleon T association (T Tauri type stars)
 * Champagne supernova (SN 2003 fg in Bootes)
 * Chanal's variable star (suspected variable star NSV 2229 in Orion)
 * Chaple arc (telescopic asterism Chaple 1 in Cygnus, aka Cygnus fairy ring)
 * Chavira's supernova (SN 1965 h in galaxy NGC 4666, in Virgo)
 * Checkmark nebula (Messier 17 in Sagittarius, aka Omega nebula, Swan nebula)
 * Cheerio nebula (planetary nebula NGC 6337 in Scorpius, aka Scorpius ring)
 * Cheese burger nebula (planetary nebula NGC 7026 in Cygnus)
 * Cheshire cat (a telescopic asterism in Auriga, aka Smiley face)
 * Cheshire cat (galaxycluster SDSS J1038+4849 with Einstein ring, aka Smiley)
 * Chevremont's star (in globular cluster Messier 2 in Aquarius)
 * Chevron (a V shaped telescopic asterism in Canis Major, aka Nagler 1)
 * Chi Crucis cluster (an open star cluster in Crux)
 * Chi-1 Fornacis moving group (Alessi 13 in Fornax)
 * Chi 1, 2, 3 (an asterism in Fornax, shaped like a triangle)
 * Chiclet (an asterism in Pisces, also known as Little Joe) (this asterism is part of the forgotten constellation Testudo)
 * Chinese kite (a telescopic asterism in Hercules)
 * Christmas tree cluster (open star cluster NGC 2264 in Monoceros)
 * Chrysalis galaxy (NGC 1808 in Columba)
 * Chuadze's supernova (SN 1967 c in galaxy NGC 3389 in Leo)
 * Chu's object (a star -?- in Perseus)
 * Cigar galaxy (Messier 82 in Ursa Major)
 * Cigar galaxy (NGC 55 in Sculptor)
 * Circinus galaxy (ESO 97-G13 in Circinus)
 * Circinus molecular cloud
 * Cirrus nebula (NGC 6960, NGC 6992, NGC 6995 in Cygnus)
 * Claw galaxy (NGC 247 in Cetus)
 * Cleopatra's eye (planetary nebula NGC 1535 in Eridanus, aka Pale blue planetary)
 * Cloud nebula (Cederblad 132 in Scorpius, aka Antares nebula)
 * Cloverleaf quasar (gravitationally lensed quasar QSO J1415+1129 in Leo)
 * Clowes-Campusano Large Quasar Group (CCLQG in Leo, aka LQG 3, U1 28)
 * Clown face nebula (planetary nebula NGC 2392 in Gemini, aka Eskimo nebula)
 * CMB cold spot (CMB = Cosmic Microwave Background radiation, in Eridanus)
 * Coalman (Lynds dark nebula 810 in Vulpecula)
 * Coalsack cluster (open star cluster NGC 4609 in the Coalsack dark nebula, in Crux)
 * Coalsack nebula (dark dust cloud in Crux, aka Soot bag)
 * Coalsack planetary (a planetary nebula in Crux)
 * Coathanger (binocular-friendly asterism Collinder 399 in Vulpecula, aka Al Sufi's cluster, Brocchi's cluster)
 * Cobra and mouse (galaxies NGC 2442 and NGC 2443 in Volans, aka Meathook galaxy)
 * Cocoon galaxy (NGC 4490 in Canes Venatici)
 * Cocoon galaxy (NGC 4990 in Virgo)
 * Cocoon nebula (IC 5146 in Cygnus, aka Tomm Lorenzin 12)
 * Cocytus stream (a stellar stream related to our galaxy)
 * Coddington's "nebula" (galaxy IC 2574 in Ursa Major)
 * Cohen-Schwartz star (a T Tauri type star and infrared source in Orion)
 * Cojones (telescopic asterism LTA 1 in Orion)
 * Colliding galaxies (NGC 2992 and NGC 2993 in Hydra)
 * Colori superbi (binary star h 1470 in Cygnus, thus named or described by T.W.Webb in Celestial Objects for Common Telescopes, Volume 2: The stars, page 102)
 * Columba association (aka Great Austral Young Association - GAYA)
 * Columba supercluster (a supercluster of galaxies)
 * Columba void
 * Coma Berenices (a dwarf spheroidal galaxy which received the name of the constellation Coma Berenices, aka Coma dwarf, PGC 4713557)
 * Coma cluster of galaxies (Abell 1656 in Coma Berenices)
 * Coma filament (part of CfA great wall)
 * Coma star cluster (binocular friendly open star cluster Melotte 111, which is also known as the Tuft in the tail of the lion)
 * Coma supercluster (nearby supercluster of galaxies SCL 117 in Coma Berenices)
 * Coma void
 * Coma wall (aka CfA2 great wall) (CfA2 = Second survey, Center for Astrophysics, Redshift survey)
 * Cometary galaxy (NGC 7793 in Sculptor)
 * Cometary globule head (NGC 5367 + Be 146 in Centaurus)
 * Cometary planetary (planetary nebula NGC 1360 in Fornax, aka Robin's egg nebula)
 * Comet galaxy (a member of galaxycluster Abell 2667 in Sculptor)
 * Compass (?) (this could be a nickname of the system of galaxies NGC 4567 and NGC 4568)
 * Complete telescopic comet (galaxy NGC 1325 in Eridanus)
 * Condor galaxy (NGC 6872 in Pavo)
 * Cone nebula (part of NGC 2264 in Monoceros)
 * Cooling tower (open star cluster Messier 29 in Cygnus)
 * Copeland's septet (galaxygroup Hickson 57 in Leo)
 * Cork nebula (planetary nebula Messier 76 in Perseus, aka Little Dumbbell nebula, Barbell)
 * Corona Australis molecular cloud (NGC 6726, NGC 6727, NGC 6729, and IC 4812)
 * Corona Borealis cluster of galaxies (Abell 2065)
 * Corona Borealis supercluster (galaxyclusters Abell 2061, 2065, 2067, 2079, 2089, 2092, and 2124 too?)
 * Corona Borealis void
 * Coronet cluster (R Coronae Australis cluster)
 * Cosmic cannonball (the radio-quiet neutron star RX J0822-4300 in Puppis)
 * Cosmic horseshoe (a gravitationally lensed system of two galaxies in Leo, with foreground galaxy LRG 3-757) (LRG = Luminous Red Galaxy)
 * Cosmic question mark (a telescopic asterism in Cetus, aka Wienerroither 1, Ramakers 14)
 * Cosmos redshift 7 (a high-redshift Lyman-alpha emitter galaxy in Sextans, aka Galaxy cosmos redshift 7, CR 7)
 * Cotton candy nebula (a protoplanetary nebula in Ara)
 * Council of giants (a ring of twelve large galaxies surrounding the Local group)
 * Crab nebula (Messier 1 in Taurus)
 * Crab pulsar (pulsar PSR B0531+21 in the Crab nebula, aka Baade's star, CM Tauri)
 * Crampton-Cowley-Hartwick LQG (a large quasar group, aka Komberg-Kravtsov-Lukash LQG 10)
 * Crater II / Crater 2 (a low surface brightness dwarf satellite galaxy in Crater)
 * Crater cluster (globular star cluster Laevens 1 in Crater)
 * Crescent nebula (NGC 6888 in Cygnus)
 * Crescent nebula (NGC 6445 in Sagittarius, aka Little gem)
 * Crocodile (telescopic asterism and open star cluster NGC 1981 in Orion, aka Alligator)
 * Crooked billet (a vacant space near Eta Carinae)
 * Crossbow (telescopic asterism Tomm Lorenzin 6 in Cepheus)
 * Crosseyed galaxies (NGC 3166 and NGC 3169 in Sextans)
 * Crossroads galaxy (NGC 4753 in Virgo, aka Peculiar twist)
 * Crouton (asterism Mac Robert 2 in Ursa Major)
 * Crowbar galaxy (NGC 4656/4657 in Canes Venatici)
 * Crown cluster (a telescopic asterism in Ursa Major)
 * Crystal ball nebula (planetary nebula NGC 1514 in Taurus)
 * Cube (telescopic asterism Tomm Lorenzin 20 in Virgo)
 * Curved arrow (a telescopic asterism in Coma Berenices)
 * CV Monocerotis cluster (open star cluster VandenBergh 1, in Monoceros)
 * Cyclone galaxy (NGC 2997 in Antlia)
 * Cygnus egg nebula (CRL 2688, aka RAFGL 2688, Egg nebula)
 * Cygnus spur (a region in our galaxy)
 * Cygnus star cloud (Sharpless 2-101, aka Tulip nebula)
 * Cygnus superbubble
 * Cygnus wall ("Mexico" and "Central America" in the North America Nebula)

D

 * Dalrymples object (galaxy NGC 7418-A in Grus) (?)
 * Dandelion pufball nebula (planetary nebula NGC 6751 in Aquila, aka Glowing eye nebula)
 * Dark bay nebula (Barnard 33 in Orion, aka Horsehead nebula)
 * Dark doodad nebula (dark dustcloud Sandqvist 149 in Musca)
 * Dark emu (a rater large part of the dark dustcloud complex in the southern section of the milky way)
 * Dark lane (telescopic asterism Harrington's STAR 10 in Cygnus)
 * Darklane galaxy (Messier 104 in Virgo, aka Sombrero galaxy)
 * Dark tower (NGC 6231 in Scorpius)
 * Dark wolf nebula (dark dustcloud Barnard 228 in Lupus)
 * Das Rheingold (aka Graham's object in Volans)
 * David's "D" (open star cluster and telescopic asterism Collinder 21 in Triangulum)
 * Davis's dog (a binocular friendly asterism between Messier 45 - Pleiades and the Hyades)
 * Debilissima (Epsilon 1 and Epsilon 2 Lyrae, aka Double-Double, was called Debilissima by Sir John Herschel, see T.W.Webb's Celestial Objects for Common Telescopes, Volume 2: The Stars, page 167)
 * Deer lick group (galaxy NGC 7331 and nearby galaxies, in Pegasus)
 * Defiant finger (a small Bok globule in Carina, aka Carina defiant finger)
 * Delle caustiche (open star cluster Messier 24 in Sagittarius, aka Small Sagittarius starcloud)
 * Delphinus minor (a telescopic asterism in Pegasus)
 * Delta Lyrae cluster (open star cluster Stephenson 1, in Lyra)
 * De Mairan's nebula (part of the Orion nebula - Messier 42)
 * Demon star (Beta Persei, aka Algol)
 * Devil's mask (galaxies NGC 6769, NGC 6770, and NGC 6771 in Pavo)
 * Diabolo nebula (planetary nebula Messier 27 in Vulpecula, aka Dumbbell nebula, Double headed shot)
 * Diamond brooch (open star cluster NGC 7510 in Cepheus) (this nickname is mentioned in the book The Constellations by Lloyd Motz and Carol Nathansson)
 * Diamond cluster (a telescopic asterism in Delphinus)
 * Diamond cross (a telescopic asterism)
 * Diamond gem (galaxy PGC 886902 in Hydra)
 * Diamond ring (a telescopic asterism near Polaris in Ursa Minor)
 * Diamonds / Rubies / Saphyres (open star cluster NGC 2516 in Carina, aka Running man cluster, Southern beehive, Sprinter)
 * Diffuse planetary (planetary nebula NGC 5844 in Triangulum Australe)
 * Dipole repeller (see: Dipole repeller void / Local group / Shapley attractor / Shapley supercluster)
 * Dipper's sunken crouton (a binocular friendly asterism in the bowl of the Big dipper, in Ursa Major)
 * Discus galaxy (NGC 4565 in Coma Berenices)
 * DNA strand (a telescopic asterism in Aquarius)
 * Dnoces (a NASA-related name for the star Iota Ursae Majoris)
 * Dolphin nebula (NGC 3324 in Carina, aka Gabriella Mistral nebula)
 * Dolphin nebula (Sharpless 2-308 in Canis Major)
 * Dolphin's diamonds (a telescopic asterism in Delphinus, aka Toadstool)
 * Donatiello I (a dwarf spheroidal galaxy in Andromeda)
 * Dorado group (a loose concentration of galaxies in Dorado, aka NGC 1566 group)
 * Dorado twins (galaxies NGC 1549 and NGC 1553 in Dorado)
 * Double arrowhead (open star cluster NGC 3532 in Carina, aka Black arrow cluster, Football cluster, Firefly party cluster, Pincushion cluster, Wishing well cluster)
 * Double cluster (open star clusters NGC 869 and NGC 884 in Perseus, aka h+Chi Persei, Sword hand of Perseus)
 * Double cross (a telescopic asterism in Leo)
 * Double double star (Epsilon 1 and Epsilon 2 Lyrae)
 * Double Einstein ring (gravitational lens system SDSS J0946+1006)
 * Double headed shot (planetary nebula Messier 27 in Vulpecula, aka Diabolo nebula, Dumbbell nebula)
 * Double helix nebula (in Ophiuchus, near the galactic center)
 * Double hub galaxy (NGC 5746 in Virgo)
 * Double quasar (in Ursa Major, aka Twin Quasar, Twin QSO)
 * Double triangle (a telescopic asterism in Taurus)
 * Dove galaxy (Messier 82 in Ursa Major)
 * Dox (white dwarf star SDSS J124043.01+671034.68 in Draco)
 * Draco dwarf galaxy (UGC 10822 in Draco, aka DDO 208, PGC 60095, Draco dwarf spheroidal, Draco dSph)
 * Draco supercluster (a supercluster of galaxies in Draco, aka SCL 114)
 * Draco - Ursa Major supercluster (a supercluster of galaxies in the constellations Draco and Ursa Major)
 * Dragon (the most distant galaxycluster catalogued by George Abell, lensed and distorted by Abell 370, in Cetus)
 * Dragonfish nebula (massive emission nebula GAL 298.4-00.4 in Crux)
 * Dragonfly 44 (an ultra diffuse galaxy in Coma Berenices)
 * Dragonfly cluster (open star cluster NGC 457 in Cassiopeia, aka Owl cluster)
 * Dragon nebula (in the Gamma Cygni complex)
 * Dragon nebula (NGC 1499 in Perseus, aka California nebula)
 * Dragon nebula (Barnard 296 in the Lagoon nebula - Messier 8, in Sagittarius)
 * Duck nebula (NGC 2359 in Canis Major, aka Thor's helmet)
 * Dumbbell nebula (planetary nebula Messier 27 in Vulpecula, aka Diabolo nebula, Double headed shot)
 * Dusty nebula (Gum 23 in Vela)
 * Dwingeloo 1 / 2 (galaxies in Cassiopeia)

E

 * Eagle nebula (IC 2177 in Monoceros, aka Seagull nebula)
 * Eagle nebula (Messier 16 in Serpens, aka Star queen nebula)
 * Earendel (the most distant known star, WHL 0137-LS, in Cetus)
 * Earth's nearest globular (globular star cluster NGC 6397 in Ara)
 * Easter egg double (Eta Cassiopeiae, aka Achird)
 * Eggen's nearby star (CoD -31°622 in Sculptor)
 * Egg nebula (bipolar planetary nebula CRL 2688 in Cygnus, aka RAFGL 2688, Cygnus egg nebula)
 * Eggs for breakfast
 * Eiffel tower (telescopic asterism Ferrero 6 in Ursa Major)
 * Eight burst nebula (planetary nebula NGC 3132 in Vela, aka Southern ring nebula)
 * Einstein's cross (aka Huchra's lens, in Pegasus)
 * Eklund's "J" (a telescopic asterism in Cygnus)
 * Elektra nebula (the nebula at and near the star Elektra in the Pleiades - Messier 45 in Taurus)
 * Elephant trunk (nebula IC 1396 in Cepheus)
 * El Gordo (galaxycluster ACT-CL J0102-4915 in Phoenix)
 * El Kanbi 7 (a telescopic asterism in Pisces)
 * Ellipse (planetary nebula NGC 2440 in Puppis, aka Bow tie nebula)
 * Elongated spiral (galaxy NGC 2613 in Pyxis)
 * Elosser 1 (a telescopic asterism in Orion)
 * Emerald nebula (planetary nebula NGC 6572 in Ophiuchus, aka Blue racketball, Green nebula, Turquoise orb)
 * Emperor Seiwa nebula (protoplanetary nebula IRAS 20068+4051 in Cygnus)
 * Emu (Bart Bok's "dark constellation" in the southern regions of the milky way, aka Ostrich)
 * E nebula (dark dust clouds Barnard 142 and Barnard 143 in Aquila, also known as Barnard's E nebula)
 * Engagement ring (a telescopic asterism near Polaris in Ursa Minor)
 * Engraved hourglass nebula (planetary nebula Mayall-Cannon 18 in Musca, aka Etched hourglass)
 * Epsilon Chamaeleontis association
 * Epsilon Orionis nebula (NGC 1990 in Orion)
 * Equuleus S (telescopic asterism Levy 70 in Equuleus)
 * Eridanus cluster (a galaxycluster in Eridanus, aka Fornax II cluster, De Vaucouleurs group 31)
 * Eridanus-Fornax-Dorado filament
 * Eridanus globular cluster (globular star cluster ESO 551-SC01 in Eridanus)
 * Eridanus group (a loose grouping of galaxies, aka Eridanus cloud)
 * Eridanus soft X-ray enhancement (aka Orion-Eridanus superbubble)
 * Eridanus supervoid (aka Great void)
 * Eridanus void
 * Eskimo nebula (planetary nebula NGC 2392 in Gemini, aka Clown face nebula)
 * Essertoo string (telescopic asterism Tomm Lorenzin 5 in Scutum) (the meaning of Essertoo is: S-or-2, because this asterism could be seen as an S or a 2)
 * Eta Carinae nebula (NGC 3372 in Carina)
 * Eta Ceti group (a telescopic asterism in Cetus)
 * Eta Chamaeleontis cluster (Mamajek 1 in Chamaeleon, aka Eta Chamaeleontis association)
 * Etched hourglass (planetary nebula Mayall-Cannon 18 in Musca, aka Engraved hourglass nebula)
 * E.T. cluster (open star cluster NGC 457 in Cassiopeia, aka Owl cluster)
 * Evil eye galaxy (Messier 64 in Coma Berenices, aka Black eye galaxy, Sleeping beauty galaxy)
 * Exclamation mark galaxy (in Phoenix)
 * Exclamation point galaxy (Arp 302 in Bootes, aka VV 340, UGC 9618)
 * Eyeball nebula (planetary nebula NGC 4071 in Musca)
 * Eye of Medusa (galaxy NGC 4194 in Ursa Major, aka Medusa merger)
 * Eye of Sauron (planetary nebula NGC 7293 in Aquarius, aka Helix nebula)
 * Eye of Sauron (HR 4976 A in Centaurus)
 * Eye of Sauron (galaxy NGC 4151 in Canes Venatici)
 * Eye of Sauron (planetary nebula M 1-42 in Sagittarius)
 * Eyes galaxies (NGC 4435 and NGC 4438 in Virgo)

F

 * Fab four galaxies (galaxygroup Hickson 44 in Leo = NGC 3185, NGC 3187, NGC 3190, NGC 3193)
 * Faint bubble nebula (EZ Canis Majoris ?)
 * Faint comet nebula (globular star cluster NGC 4833 in Musca)
 * Faint haze galaxy (NGC 1433 in Horologium)
 * Faint star points cluster (globular star cluster NGC 5286 in Centaurus)
 * Fairy ring (a telescopic asterism in Cygnus, aka Chaple arc)
 * False comet (open star cluster NGC 6231 in Scorpius, aka Northern jewel box)
 * False comet (nebula IC 4628 in Scorpius, aka Prawn nebula)
 * False cross (the rather easy to observe asterism created by the stars Epsilon Carinae, Iota Carinae, Delta Velorum, and Kappa Velorum)
 * Fan nebula (nebulae NGC 3581 and NGC 3582 in Carina)
 * Far southern planetary (planetary nebula NGC 3195 in Chamaeleon)
 * Fastest unbound star in the galaxy (hypervelocity O-class subdwarf US 708)
 * Fath 703 (galaxy NGC 5892 in Libra)
 * Fehrenbach's star (HD 116745 in globular star cluster Omega Centauri)
 * Fetus nebula (planetary nebula NGC 7008 in Cygnus)
 * Field of streams (crisscross of stellar streams)
 * Filamentary nebula (NGC 6960 in Cygnus)
 * Fimbulthul stream (a stellar stream torn off from globular star cluster Omega Centauri)
 * Fireflies cluster (globular star cluster NGC 2808 in Carina)
 * Firefly party cluster (open star cluster NGC 3532 in Carina, aka Black arrow cluster, Double arrowhead, Football cluster, Pincushion cluster, Wishing well cluster)
 * Firework nebula (the remains of Nova Persei 1901 in Perseus)
 * Fireworks galaxy (NGC 6946 in Cepheus/Cygnus)
 * Fishhead nebula (IC 1795 / NGC 896 in Cassiopeia) (aka: the head of the Running dog nebula)
 * Fish hook (a telescopic asterism in Scutum, aka Button hook, J-string)
 * Fish hook (a telescopic asterism in Taurus)
 * Fish on the platter (dark dust cloud Barnard 144 in Cygnus, aka Lynds Dark Nebula 857 - LDN 857)
 * Fish's mouth nebula (in Orion)
 * Five pointed star (open star cluster Dolidze-Dzimselejsvili 8 - DoDz 8 in Hercules)
 * Flame (NGC 2024 in Orion, aka Flaming tree nebula, Tank Track)
 * Flaming star nebula (IC 405 in Auriga, aka Schaeberle's flaming star)
 * Flaming tree nebula (NGC 2024 in Orion, aka Flame, Tank Track)
 * Fleming 1 (an unusual planetary nebula in Centaurus, aka PK 290+07.1)
 * Flower (telescopic asterism STAR 7 in Hercules, aka Zig-zag, Ramakers 31)
 * Flying bat nebula (Sharpless 2-129 in Cepheus, aka Ou 4)
 * Flying bird galaxy (UGC 6345 in Leo, aka VV 795)
 * Flying lizard nebula (NGC 602 in Hydrus)
 * Flying minnow (a binocular friendly asterism in Auriga, aka Leaping minnow)
 * Flying star (Groombridge 1830 in Ursa Major)
 * Flying V (interacting galaxies in Camelopardalis, aka IC 2184)
 * Fly swatter (telescopic asterism Poskus 1 in Delphinus)
 * Flywing galaxy (NGC 5152 / NGC 5153 in Hydra, aka Fly's wing galaxy)
 * Football cluster (open star cluster NGC 3532 in Carina, aka Black arrow cluster, Double arrowhead, Firefly party cluster, Pincushion cluster, Wishing well cluster)
 * Footprint galaxy (Gibson-Reaves 8 in Virgo)
 * Footprint nebula (aka Minkowski's footprint, in Cygnus)
 * Fornax A (NGC 1316 in Fornax)
 * Fornax cluster (galaxygroup Abell S0373, aka NGC 1399 group, LGG 96 - Lyons Groups of Galaxies 96)
 * Fornax dwarf system (elliptical dwarf galaxy ESO 356-G4, aka Fornax dwarf spheroidal)
 * Fornax-Eridanus supercluster (a supercluster of galaxies in Fornax and Eridanus)
 * Fornax void
 * Fornax wall
 * Fourcade-Figueroa object (NGC 5237 ? in Centaurus)
 * Fox fur nebula (near NGC 2264 in Monoceros)
 * Foxhead (open star cluster NGC 6819 in Cygnus)
 * Fried egg galaxy (NGC 7742 in Pegasus)
 * Fried egg galaxy (NGC 1291 in Eridanus)
 * Frisbee galaxies (NGC 4216 and NGC 4222 in Virgo)
 * Frosty Leo (bipolar protoplanetary nebula IRAS 09371+1212 in Leo)
 * Full house (multiple star system South 537-8 in Canis Major)
 * Funnel (a telescopic asterism in Lepus)

G

 * Gabriella Mistral nebula (NGC 3324 in Carina, aka Dolphin nebula)
 * Gaia Enceladus (see: Gaia sausage)
 * Gaia-Enceladus-sausage (aka Sausage galaxy, Gaia-sausage-Enceladus)
 * Gaia sausage (a stream of globular clusters: NGC 1851, NGC 1904 (Messier 79), NGC 2298, NGC 2808, NGC 5286, NGC 6864 (Messier 75), NGC 6779 (Messier 56), NGC 7089 (Messier 2)) (aka Gaia Enceladus)
 * Galactic "G" (a telescopic asterism in Draco, aka HD 144082 group)
 * Galactic ghoul (nebula DR 6 in Cygnus)
 * Gale's planetary (planetary nebula IC 5150 in Grus)
 * Gamma Cassiopeia nebula (Sharpless 2-185 in Cassiopeia, aka IC 59 and IC 63)
 * Gamma Cygni nebula (aka Cygnus nebula)
 * Gamma Scuti starcloud
 * Garland (NGC 3077 ? in Ursa Major)
 * Garnet star nebula (IC 1396 in Cepheus)
 * Gaseosa nebula (Messier 16 in Serpens) (the origin of this name is questionable)
 * Gas pump handle (a telescopic asterism in Ursa Major)
 * G-cloud complex (an interstellar cloud near the local interstellar cloud or local fluff, in the local bubble)
 * Gem cluster (open star cluster NGC 3293 in Carina)
 * Geminga (in Gemini)
 * Gemini cluster of galaxies (Abell 568 in Gemini)
 * Gem of the milky way (aka Scutum star cloud)
 * Ghosthead nebula (NGC 2080 in the Large Magellanic Cloud - LMC, in Dorado)
 * Ghost nebula (Sharpless 2-136 in Cepheus, aka Van den Bergh 141)
 * Ghost of Jupiter (planetary nebula NGC 3242 in Hydra, aka CBS eye)
 * Ghouls head (nebula NGC 6357 in Scorpius, aka Lobster nebula, War-and-peace nebula)
 * Giant arc (a large scale structure)
 * Giant emission nebula (NGC 346 in the Small Magellanic Cloud - SMC, in Tucana)
 * Giant R.G.B. ring (G.R.B. = Gamma Ray Bursts)
 * Giant nebula (NGC 1936 / IC 2127 in the Large Magellanic Cloud - LMC, in Dorado)
 * Giant squid nebula (Ou 4 in Cepheus)
 * Giant void (aka Canes Venatici supervoid, Giant void in N.G.H.) (N.G.H. = Northern Galactic Hemisphere)
 * Gibson-Reaves 8 (DDO 155 in Virgo, aka Footprint galaxy, UGC 8091)
 * Gingrich cluster (open star cluster IC 348 in Perseus)
 * Glowing eye nebula (planetary nebula NGC 6751 in Aquila, aka Dandelion puffball)
 * God's hand (star forming region Sandqvist 103 in Puppis, aka GC 4)
 * Godzilla galaxy (UGC 2885 in Perseus, aka Rubin's galaxy)
 * Golden eye cluster (open star cluster Messier 67 in Cancer, aka King cobra cluster)
 * Golden horseshoe (a telescopic asterism in Circinus)
 * Goldilocks variable (a variable star in planetary nebula Messier 27, the Dumbbell nebula in Vulpecula)
 * Golf putter (a telescopic asterism near open star cluster NGC 752 in Andromeda, known as the ball)
 * Gomez's hamburger (a possible bipolar planetary nebula in Sagittarius, aka Gomez nebula)
 * Gould belt (a local, partial ring of stars in the milky way)
 * Grace note (double star system Tomm Lorenzin 18 in Lyra)
 * Graff cluster (open star cluster IC 4756 in Serpens)
 * Graham's object (aka Das Rheingold, Niebelungen ring, in Volans)
 * Grasshopper (interacting galaxies UGC 4881 / Arp 55 in Lynx)
 * Gravity's lens (quasar 0957+561 A/B in Ursa Major)
 * Great annihilator (microquasar 1E1740.7-2942 in Ophiuchus)
 * Great attractor (Abell 3627 in Norma and Triangulum Australe, aka Norma cluster, at the center of the Laniakea supercluster)
 * Great Austral Young Association - G.A.Y.A. (3 groups: Tucana-Horologium association, Carina association, Columba association)
 * Great barred spiral galaxy (NGC 1365 in Fornax)
 * Great Centaurus spiral (NGC 4945)
 * Great dark horse (dark dustcloud complex in Ophiuchus, aka Prancing horse, Dark horse nebula)
 * Great globular cluster (globular star cluster Messier 13 in Hercules, aka Hercules cluster)
 * Great globular cluster (globular star cluster Messier 22 in Sagittarius)
 * Great nothing (aka Bootes void)
 * Great Pavo spiral (spiral galaxy NGC 6744 in Pavo)
 * Great peacock globular (globular star cluster NGC 6752 in Pavo)
 * Great rift (dark dustcloud complex in Aquila)
 * Great wall (superstructure of galaxies and galaxyclusters)
 * Green nebula (planetary nebula NGC 6572 in Ophiuchus, aka Blue racquetball, Emerald nebula, Turquoise orb)
 * Greg's "3" (a telescopic asterism in Leo)
 * Grindlay 1 (a globular star cluster in Scorpius)
 * Group X (a proposed moving group of stars in Ursa Major, aka Group 10)
 * Grus quartet (the quartet of galaxies NGC 7552, NGC 7582, NGC 7590, NGC 7599 in Grus)
 * Grus supercluster
 * Grus wall
 * Guitar (Abell 1185 in Ursa Major, very near or at Ambartsumian's knot)
 * Guitar nebula (in Cepheus) (see: Sky & Telescope, may 1993, page 8)
 * Gulf of Mexico (part of the North America nebula, in Cygnus)
 * Gum nebula (in Vela)
 * Gummy bear nebula (planetary nebula NGC 7027 in Cygnus, aka Jewel bug nebula)
 * Gyulbudaghian's nebula (HH 215 in Cepheus, near or at PV Cephei)

H

 * Hagen clouds (see: Father Johann Georg Hagen)
 * Halo (He2-116 in Circinus)
 * Hamburger galaxy (NGC 3628 in Leo, aka Hot dog galaxy, Sarah's galaxy)
 * Hamilton's object (gravitational lensing configuration SDSS J223010.47-081017.8)
 * Hammerhead nebula (in Orion)
 * Hand of god (nebula around pulsar PSR B1509-58 in Circinus)
 * Hand of god (CG4 0732-4652 in Puppis)
 * Hanny's voorwerp (near IC 2497 in Leo Minor)
 * Hardcastle "nebula" (a barred spiral galaxy in Centaurus)
 * Haro 10 (NGC 5253 in Centaurus)
 * Harrington's galaxy (NGC 7040 in Equuleus) (Mark Walrod Harrington's discovery)
 * Haufen A (a galaxycluster in Cetus)
 * Haute Provence 1 (a globular star cluster in Ophiuchus)
 * Haze nebula (star forming region NGC 2467 in Puppis, aka Skull and crossbones nebula, Mandrill)
 * HD 4798 group (a telescopic asterism in Pisces)
 * HD 106112 group (a telescopic asterism in Camelopardalis)
 * HD 175841 group (a telescopic asterism in Lyra)
 * Headphone nebula (planetary nebula Jones-Emberson 1 in Lynx, aka PK 164+31.1)
 * Heart (a telescopic asterism in Hydra)
 * Heart and soul (a complex of two nebulae in Cassiopeia: IC 1805 (Heart nebula), IC 1848 (Soul nebula), aka Westerhout 5)
 * Heart nebula (IC 1805 + open star cluster Melotte 15, aka Running dog nebula)
 * Heart shaped cluster (open star cluster Messier 50 in Monoceros)
 * Heiles clouds (high opacity dust clouds) (see: Carl Eugene Heiles)
 * Helix galaxy (NGC 2685 in Ursa Major)
 * Helix nebula (planetary nebula NGC 7293 in Aquarius)
 * Helmi stream (a defunct dwarf galaxy) (see: Amina Helmi)
 * Hercules (dwarf galaxy PGC 4713560 in Hercules) (note: this object received the name of the constellation in which it was discovered)
 * Hercules cluster of galaxies (Abell 2151) (part of the Hercules supercluster)
 * Hercules-Corona Borealis great wall (aka Great R.G.B. wall) (G.R.B. = Gamma Ray Bursts)
 * Hercules globular cluster (globular star cluster Messier 13)
 * Hercules-Lyra association
 * Hercules stream (a moving group of stars, aka Hercules stars)
 * Hercules superclusters (SCL 160, aka Abell 2147 / 2151 (Hercules cluster) / 2152 / 2162)
 * Hercules void
 * Heron galaxy / Heron galaxies (NGC 5394 and NGC 5395 in Canes Venatici, aka Arp 84)
 * Herring galaxy (NGC 4631 in Vanes Venatici, aka Whale galaxy)
 * Herschel's garnet star (Mu Cephei)
 * Herschel's missed planetary (planetary nebula IC 2448 in Carina)
 * Herschel's ray (nebula NGC 2736 in Vela, aka Pencil)
 * Herschel's wonder star (Beta Monocerotis)
 * Hertzsprung's object (in Camelopardalis, a plate defect?)
 * Hidden galaxy (IC 342 in Camelopardalis)
 * Himiko (a Lyman-Alpha blob in Cetus)
 * Hind's crimson star (R Leporis, according to Hind: "Like drop of blood on a black field")
 * Hind's new star (in Ophiuchus)
 * Hind's variable nebula (NGC 1555 in Taurus)
 * Hoag's object (a ring shaped galaxy in Serpens)
 * Hockey stick (galaxies NGC 4631 and NGC 4656 in Canes Venatici)
 * Hoffmeister's cloud (a dark nebula in Microscopium)
 * Hoffmeister's star (V 442 Cassiopeiae, aka Sonneberg 9484)
 * Hole-in-a-cluster (open star cluster NGC 6811 in Cygnus, aka Scotty Houston's hole-in-a-cluster)
 * Hole in the heavens (IC 4604 in Ophiuchus, aka Rho Ophiuchi dust complex)
 * Holmberg galaxies (9 galaxies in the constellations Camelopardalis, Canes Venatici, Eridanus, Ursa Major, Virgo)
 * Home plate (a telescopic asterism in Andromeda)
 * Homunculus nebula (a bipolar emission/reflection nebula in Carina, aka Keyhole nebula)
 * Honda's variable star (in Cygnus)
 * Honeycomb nebula (part of the Large Magellanic Cloud - L.M.C.)
 * Horologium dwarf (aka Schuster's spiral)
 * Horologium-Reticulum supercluster (aka Horologium supercluster)
 * Horologium supercluster (aka Horologium-Reticulum supercluster)
 * Horse and rider (Mizar and Alcor in Ursa Major)
 * Horsehead nebula (dark cloud Barnard 33 in Orion, aka Dark bay nebula)
 * Horseshoe (telescopic asterism Harrington STAR 28, in Cygnus)
 * Horseshoe nebula (Messier 17 in Sagittarius, aka Omega nebula)
 * Hot dog galaxy (NGC 3628 in Leo, aka Sarah's galaxy)
 * Hourglass nebula (planetary nebula Mayall-Cannon 18 in Musca, aka H.S.T. hourglass)
 * Hourglass nebula (in Sagittarius)
 * HSL chain (telescopic asterism Tomm Lorenzin 3 in Sagittarius)
 * H.S.T. hourglass (planetary nebula Mayall-Cannon 18 in Musca, aka Hourglass nebula)
 * Hubble's double bubble (Hubble 5 in Sagittarius)
 * Hubble's variable nebula (NGC 2261 in Monoceros)
 * Huchra's lens (aka Einstein's cross, in Pegasus)
 * Huge L.Q.G. (aka Huge Large Quasar Group, U1.27 in Leo)
 * Hulse-Taylor pulsar (PSR 1913+16 in Aquila, aka Hulse-Taylor binary)
 * Huntsman nebula (G333.6-0.2 in Norma)
 * Huruhata's object (a binary star in Canis Minor)
 * Huruhata's variable (EG Cancri)
 * Hyades stream (a large collection of scattered stars, aka Hyades moving group, Taurus stream, Hyades supercluster)
 * Hydra A (a galaxy in Hydra)
 * Hydra-Centaurus supercluster (a supercluster of galaxies in Hydra and Centaurus, aka Antlia wall)
 * Hydra cluster (galaxycluster Abell 1060, aka Hydra I)
 * Hydra I (galaxycluster Abell 1060, aka Hydra cluster)
 * Hydra II (a galaxycluster)
 * Hydra void
 * Hyperion proto-supercluster (in Sextans)

I

 * IC a "37" (open star cluster and telescopic asterism NGC 2169 in Orion, aka "LE" cluster, I see a "37")
 * IC 342 group (Lyons Groups of galaxies 104 - LGG 104, aka Maffei 1 group, in the constellations Camelopardalis, Cassiopeia, and Perseus)
 * Icarus (Lensed star 1 in Leo, aka "Warhol", MACS J1149)
 * Illusive planetary (planetary nebula He 1-5 in Sagitta, aka FG Sagittae?)
 * Illustris, proegrandis (galaxy NGC 2841 in Ursa Major, thus named or described by Heinrich d'Arrest, see T.W.Webb's Celestial Objects for Common Telescopes, Volume 2: The Stars, page 246)
 * Inch worm (a telescopic asterism in Lynx)
 * Indus dwarf (dwarf galaxy IC 5152 in Indus)
 * Inkblot galaxy (NGC 1313 in Reticulum)
 * Inkspot nebula (dark dust cloud Barnard 86 in Sagittarius)
 * Inne's star (Proxima Centauri in Centaurus, after the sun the nearest star)
 * Integral sign galaxy (UGC 3697 in Camelopardalis)
 * Intergalactic tramp (globular star cluster NGC 2419 in Lynx, aka Intergalactic wanderer)
 * IOK 1 (the most distant galaxy (2006) in Coma Berenices) (I.O.K. = Iye / Ota / Kashikawa)
 * Iota Orionis nebula (NGC 1980 in Orion)
 * Iris nebula (NGC 7023 in Cepheus)
 * Iron star (variable star XX Ophiuchi)

J

 * January salt-and-pepper (open star cluster Messier 37 in Auriga)
 * Javelin (galaxy IC 5052 in Pavo)
 * Jaws (a telescopic asterism in Virgo)
 * Jellyfish nebula (IC 443 in Gemini, aka Sharpless 2-248)
 * Jewel box (open star cluster NGC 4755 in Crux, aka Kappa Crucis cluster)
 * Jewel box (open star cluster Messier 6 in Scorpius, aka Butterfly cluster)
 * Jewel bug nebula (planetary nebula NGC 7027 in Cygnus, aka Gummy bear nebula)
 * Jewels in the belt (the row of three bright stars in Orion, aka Collinder 70)
 * Jones 1 (a planetary nebula in Pegasus)
 * J-string (a telescopic asterism in Scutum, aka Button hook, Fish hook)
 * July salt-and-pepper (open star cluster Messier 11 in Scutum, aka Wild duck cluster)
 * Jupiter nebula (planetary nebula NGC 3242 in Hydra, aka CBS eye, Ghost of Jupiter)

K

 * Kangaroo (a telescopic asterism in Bootes)
 * Kappa Crucis cluster (open star cluster NGC 4755 in Crux, aka Jewel box)
 * Kapteyn's star (HD 33793 in Pictor)
 * KBC group (telescopic asterism Tomm Lorenzin 9 in Taurus, aka Collinder 65, Klingon battle cruiser)
 * K.B.C. void (a supervoid, aka Local hole) (K.B.C. = Ryan Keenan / Amy Barger / Lennox Cowie)
 * Keenan's system (the pair of connected galaxies NGC 5216 and NGC 5218 in Ursa Major, aka Arp 104)
 * Kelu 1 (a system of two brown dwarf stars in Hydra) (the meaning of Kelu: the color red in Mapuche language)
 * Kemble's cascade star chain (a binocular friendly asterism in Camelopardalis, aka Kemble 1, Toothpick)
 * Kemble's kite (a telescopic asterism in Cassiopeia, aka Scoop)
 * Kepler's star (Johannes Kepler's supernova in Ophiuchus, aka SN 1604)
 * Keyhole nebula (aka Homunculus nebula, in Carina)
 * Keystone (a telescopic asterism in Cetus) (not to be confused with the much larger asterism Keystone in Hercules)
 * Kidney bean galaxy (NGC 4774 in Canes Venatici)
 * Kids, the (a binocular friendly asterism, created by the stars Epsilon Auriga, Zeta Auriga, and Eta Auriga)
 * King cobra cluster (open star cluster Messier 67 in Cancer, aka Golden eye cluster)
 * King L.Q.G. (a large quasar group) (King = George King, L.Q.G. = Large Quasar Group)
 * Kinman's dwarf (a low-metallicity blue compact dwarf galaxy in Aquarius, aka PHL 293B, PGC 69018)
 * Kite, the (open star cluster NGC 6866 in Cygnus)
 * Kleinman-Low nebula (an infrared source in the Great Orion nebula Messier 42)
 * Klemola 44 (a galaxycluster in Sculptor)
 * Klemola's star (in Leo)
 * Klingon battlecruiser (open star cluster NGC 1662 in Orion)
 * Knife edge galaxy (NGC 5907 in Draco, aka Splinter galaxy)
 * Komberg-Kravtsov-Lukash L.Q.G. (a large quasar group) (L.Q.G. = Large Quasar Group)
 * Komossa's object (elliptical galaxy RX J1242.6-1119A in Virgo)
 * Kowel's object (or Kowal's object?) (aka Sagittarius dwarf irregular galaxy)
 * Kron 3 (a globular star cluster in Tucana)
 * Krzeminski's star (in Centaurus)
 * Kurtz's light variable star (HD 188136 in Octans)
 * Kutner's cloud (Lynds Dark Nebula 1524 - LDN 1524 in Taurus)
 * Kuwano's object (PU Vulpeculae)

L

 * "L" (telescopic asterism Ferrero 37 in Auriga)
 * Lacework nebula (NGC 6960 in Cygnus)
 * La cicatrice (a telescopic asterism in Sextans, aka Rinnan's run)
 * Lacrosse racket (open star cluster and telescopic asterism Melotte 31 in Auriga)
 * Lady in Canada (part of the North America nebula in Cygnus)
 * Lagoon in L.M.C. (nebulae NGC 1763 and NGC 1769 in Dorado) (L.M.C. = Large Magellanic Cloud)
 * Lagoon nebula (Messier 8 in Sagittarius)
 * Lambda Centauri nebula/cluster (IC 2944 and IC 2948 in Centaurus, aka Running chicken nebula)
 * Lambda-Lambda (telescopic asterism and open star cluster Collinder 69 in Orion)
 * Lambda Orionis nebula (Sharpless 2-264 in Orion, aka Lambda Orionis ring, Angelfish nebula, Orion Molecular Cloud Complex - O.M.C.C.)
 * Lamont's star (in the great Andromeda galaxy Messier 31)
 * Lamost 1 (a disrupted globular star cluster)
 * Laniakea supercluster (a supercluster of galaxies of which the central part of it is located in the constellations Norma and Triangulum Australe, aka Local supercluster, Great attractor, Virgo supercluster, Laniakea complex)
 * La pointe de fleche (telescopic asterism Harrington's STAR 5 in Monoceros, aka Arrowhead, Unicorn's horn)
 * Large faint annular (a planetary nebula in Centaurus)
 * Large faint globular (globular star cluster NGC 4372 in Musca)
 * Large Magellanic Cloud - L.M.C. (a satellite galaxy near our own milky way galaxy, in the constellations Dorado and Mensa, aka Nubecula major)
 * Large quasar group (U 1.11 in Leo and Virgo)
 * Large Sagittarius starcloud (a bright section of our milky way, aka the puff of vapour from the snout of the Teapot asterism)
 * Last of the Mohicans (double star system Tomm Lorenzin 22 in Puppis)
 * La superba (variable star Y Canum Venaticorum)
 * Leaping minnow (the binocular friendly asterism Mac Robert 1 in Auriga, aka Mini Delphinus)
 * Le baton de sourcier (telescopic asterism Ferrero 31 in Centaurus, aka the "Y")
 * L'échelle de magnitude (telescopic asterism Ferrero 39 in Pictor)
 * Le cheval de Troie (telescopic asterism Ferrero 36 in Reticulum, aka Trojan horse)
 * "LE" cluster (open star cluster and telescopic asterism NGC 2169 in Orion, aka "37" cluster, IC "37", I see "37")
 * Lemon slice nebula (planetary nebula IC 3568 in Camelopardalis, aka Aitken's planetary)
 * Lensed star 1 (MACS J1149 in Leo, aka Icarus, "Warhol")
 * Lenticular galaxy (NGC 5102 in Centaurus)
 * Leo A cluster (a cluster of galaxies in Leo)
 * Leo A galaxy (aka Leo III)
 * Leo A supercluster (a supercluster of galaxies in Leo)
 * Leo B galaxy (aka Leo II)
 * Leo chain (a nearby cluster of galaxies)
 * Leo cluster of galaxies (Abell 1367)
 * Leo I galaxy (aka Regulus dwarf galaxy)
 * Leo I group (Lyons groups of galaxies 217 - LGG 217, aka Messier 96 group)
 * Leo ring (an intergalactic cloud of hydrogen and helium, in Leo)
 * Leo-Sextans supercluster (a supercluster of galaxies in Leo and Sextans)
 * Leo supercluster (galaxy supercluster SCL 93)
 * Leo triplet of galaxies (Messier 65, Messier 66, and NGC 3628)
 * Leo-Virgo supercluster (supercluster of galaxies SCL 107)
 * Leo void
 * Le sosie de Messier 73 (telescopic asterism Ferrero 51 in Hercules)
 * Letter "D" (a telescopic asterism in Eridanus)
 * Letter "F" (a telescopic asterism in Eridanus)
 * Lethe stream (a stream of stars related to our milky way galaxy)
 * Lighthouse nebula (pulsar wind nebula IGR J11014-6103 in Carina)
 * Liller 1 (a globular star cluster in Scorpius)
 * Liller's star (in Centaurus)
 * Lindsay-Shapley ring (unbarred lenticular galaxy ESO 34-11 in Volans, aka Southern ellipse)
 * Little beehive cluster (open star cluster Messier 41 in Canis Major, aka Aristoteles' cluster)
 * Little dumbbell nebula (planetary nebula Messier 76 in Perseus)
 * Little gem (planetary nebula NGC 6445 in Sagittarius, aka Crescent nebula, Square shaped ring)
 * Little gem (planetary nebula NGC 6818 in Sagittarius, aka Little gem annular nebula)
 * Little ghost (planetary nebula NGC 6369 in Ophiuchus)
 * Little homunculus (in Carina)
 * Little Joe (an asterism in Pisces, aka Chiclet) (part of the small non-IAU constellation Testudo)
 * Little Leo (a telescopic asterism in Gemini)
 * Little Orion (a telescopic asterism in Cygnus)
 * Little queen (a telescopic asterism in Draco)
 * Little sombrero galaxy (NGC 7814 in Pegasus)
 * Little star cloud (open star cluster Messier 24 in Sagittarius)
 * Lizard (dark dust cloud Barnard 138 in Aquila) (the head of the lizard is Barnard 139, one of its legs is Barnard 137)
 * Lobster (galaxy NGC 6240 in Ophiuchus, aka Starfish galaxy)
 * Lobster nebula (NGC 6357 in Scorpius, aka War-and-peace nebula)
 * Local bubble (aka Local cavity)
 * Local cavity (aka Local bubble)
 * Local fluff (aka Local interstellar cloud)
 * Local group (group of nearby galaxies)
 * Local hole (empty region of space KBC void)
 * Local interstellar cloud (aka Local fluff)
 * Local sheet (aka Council of giants)
 * Local supercluster (supercluster of galaxies Laniakea, aka Local SCL, Virgo supercluster)
 * Local void
 * Local volume
 * Lockman hole (area in the sky in which minimal amounts of neutral hydrogen gas are observed, in Ursa Major)
 * Long edgewise spiral (galaxy NGC 1448 in Horologium)
 * Longmore's group (including galaxy PGC 47203 in Centaurus)
 * Loop nebula (NGC 2070 in Dorado, aka Tarantula nebula)
 * Loop I bubble (a cavity in the interstellar medium of the Orion arm)
 * Lord Rosse's "nebula" (galaxy Messier 51 in Canes Venatici, aka Whirlpool galaxy)
 * Lost galaxy (NGC 4526 in Virgo)
 * Lovas's supernova (SN 1964e in Ursa Major, in galaxy McG 9-20-51)
 * Lower Centaurus-Crux association
 * Lower's nebula (Sharpless 2-261 in Orion)
 * Lowrey's "L" (two galaxies?, in Camelopardalis)
 * Lucky 7 (a telescopic asterism in Cassiopeia)
 * Lucy (variable white dwarf star V 886 Centauri, aka BPM 37093)
 * Ludwig's baby (a star near Sidus Ludovicianum in Ursa Major)
 * Ludwig's grandkids (several stars near Sidus Ludovicianum in Ursa Major)
 * Ludwig's star (HD 116798 in Ursa Major, aka Sidus Ludoviciana, Sidus Ludovicianum)
 * Lump star (in nebula NGC 2023, in Orion)
 * Lupus/Centaurus naked eye group (open star cluster Tomm Lorenzin 10, aka LupCen naked eye group)
 * Lupus T association (T Tauri type stars)
 * Lux Lydiae (star SAO 181 in Cepheus)
 * Luyten's flare star (L 726-8 in Cetus, aka UV Ceti system)
 * Luyten's star (BD +5°1668 in Aquila)
 * Lyman-Alpha blob 1 (a giant cosmic cloud in Aquarius)
 * Lynx arc (the hottest known star-birthing region, in Lynx)
 * Lynx supercluster (supercluster of galaxies CIG J0849+4452 (east) and CIG J0848+4453 (west))
 * Lynx-Ursa Major filament (aka LUM = Lynx Ursa Major)
 * Lynx-Ursa Major supercluster (a supercluster of galaxies in the constellations Lynx and Ursa Major)

M

 * Maffei 1 / Maffei 2 (galaxies in Cassiopeia)
 * Maffei 1 group (the nearest group of galaxies to the local group, aka LGG 104 - Lyons Groups of Galaxies 104, IC 342 group, IC 342/Maffei group)
 * Magellanic bridge (the stream of neutral hydrogen linking the two Magellanic clouds, aka MBR - Magellanic Bridge)
 * Magellanic stream
 * Magnifica (galaxy Messier 66 in Leo, thus named or described by Heinrich d'Arrest, see T.W.Webb's Celestial Objects for Common Telescopes, Volume 2: The Stars, page 156)
 * Magnificent seven (7 neutron stars, aka XDINS - X-ray Dim Isolated Neutron Stars)
 * Maia nebula (NGC 1432 near or at the star Maia in the open star cluster Pleiades, in Taurus)
 * Malin 1 (a giant low surface brightness spiral galaxy in Coma Berenices, aka PGC 42102)
 * Manatee nebula (W 50 in Aquila, aka SNR G039.7-02.0)
 * Mandrill (star forming region NGC 2467 in Puppis, aka Haze nebula, Skull and crossbones nebula)
 * Markarian's chain (a chain of galaxies, from Messier 86 to Messier 88, in Coma Berenices and Virgo)
 * Marilyn (star SAO 3816 in Cepheus)
 * Mayall's object (peculiar galaxy A1101+41 in Ursa Major)
 * McDonald's "M" (a telescopic asterism in Monoceros, aka Minus 3 group, Pakan's "3")
 * McLeish's object (a galaxy in Pavo)
 * McNeil's nebula (near Messier 78 in Orion)
 * Meathook galaxy (NGC 2442 in Volans, aka Cobra and mouse)
 * Medusa merger (the pair of interacting galaxies NGC 4194, aka Eye of Medusa)
 * Medusa nebula (planetary nebula Abell 21 in Gemini)
 * Meerschaum pipe (a telescopic asterism in Cygnus)
 * Merope nebula (NGC 1435 near or at the star Merope in open star cluster Pleiades in Taurus, aka Tempel's nebula)
 * Merrill's star (a high-velocity Wolf-Rayet star in Sagitta, the nucleus of planetary nebula PK 50+3.1)
 * Messier 51 group (a group of galaxies in Canes Venatici)
 * Messier 66 group (a group of galaxies in Leo)
 * Messier 81 group (a group of galaxies in Ursa Major and Camelopardalis)
 * Messier 94 group (a loose, extended group of galaxies in Canes Venatici and Coma Berenices)
 * Messier 96 group (a group of galaxies in Leo)
 * Messier 101 group (a loose group of galaxies in Ursa Major)
 * Messier 109 group (a group of galaxies in Ursa Major)
 * Methuselah star (one of the oldest stars known, in Libra, aka HD 140283)
 * Metronome (open star cluster and telescopic asterism Dolidze 17 in Orion)
 * Mexican jumping star (open star cluster NGC 2362 in Canis Major, aka Tau Canis Majoris cluster)
 * Mice galaxies (NGC 4676 in Coma Berenices)
 * Microscopium supercluster (supercluster of galaxies SCL 174 in Microscopium)
 * Microscopium void
 * Milky way starcloud (open star cluster Messier 24 in Sagittarius, aka Delle caustiche, Small Sagittarius starcloud)
 * Millisecond pulsar (4C+21.53 in Vulpecula)
 * Miniature spiral galaxy (NGC 3928 in Ursa Major)
 * Miniature tarantula (nebula NGC 3603 in Carina)
 * Miniature version of the Orion nebula (NGC 1931 in Auriga)
 * Mini Cassiopeia (telescopic asterism Kemble 2 in Draco, aka Little queen)
 * Mini Cassiopeia (telescopic asterism Ferrero 19 in Taurus)
 * Mini coathanger (a telescopic asterism in Ursa Minor)
 * Mini cross (a telescopic asterism in Pegasus)
 * Mini Delphinus (a binocular friendly asterism in Auriga, aka Leaping minnow)
 * Mini dragonfly (telescopic asterism French 3 in Vulpecula)
 * Mini Hyades (open star cluster NGC 7011 in Cygnus)
 * Mini Hyades (telescopic asterism NGC 2184 in Orion)
 * Mini Orion (a telescopic asterism in Canis Major)
 * Mini Scorpius (telescopic asterism and open star cluster Dolidze-Dzimselejsvili 6 in Hercules)
 * Mini teapot (telescopic asterism Markov 1 in Hercules)
 * Minkowski's butterfly (planetary nebula M 2-9 in Ophiuchus, aka Butterfly nebula)
 * Minkowski's footprint (a nebula in Cygnus, aka Footprint nebula)
 * Minkowski's object (a galaxy in Cetus)
 * Minus 3 group (telescopic asterism Tomm Lorenzin 15, aka Pakan's "3", McDonald's "M")
 * Mira (variable star Omicron Ceti, called Mira - the wonderful star by Johannes Hevelius)
 * Mirach's ghost (galaxy NGC 404 "near" the star Mirach in Andromeda)
 * Mirach's goblin (galaxy Donatiello 1 "near" the star Mirach in Andromeda)
 * Mirror of Venus (a telescopic asterism in Orion)
 * Mitchell's object (MAC 1217+4634/+4635, a vector or arrow shaped object in Canes Venatici) (two overlapping galaxies?)
 * Monkey head nebula (NGC 2175 in Orion, aka Ape man nebula)
 * Monoceros loop
 * Monoceros ring (aka Canis Major dwarf galaxy)
 * Monoceros R2 (R association)
 * Monogem ring (in Gemini and Monoceros)
 * Moving nebula (galaxy Markarian 335 in Pegasus)
 * Multi system galaxy (NGC 6845 in Telescopium)
 * Mu Normae cluster (open star cluster NGC 6169 in Norma)
 * Muscle man cluster (open star cluster Stock 2 in Cassiopeia, aka V-man cluster)
 * Musket ball cluster (galaxy cluster DLSCL J0916.2+2951 in Cancer)
 * Mystic mountain (in the Carina nebula)

Q

 * Qingluan (a planet of the star Danfeng in Tucana)
 * Quadrangle (my own name for open star cluster NGC 358 in Cassiopeia, which could be seen as a telescopic asterism)
 * Quadrangle (my own name for open star cluster NGC 6353 in Hercules, which could be seen as a telescopic asterism)
 * Quadrant arc (in Dorado)
 * Quasar without a home (aka Naked quasar, in Caelum)
 * Quaver (Lamont Hussey 120-N55, aka Eight note nebula, in Dorado)
 * Queen's kite (an asterism in Andromeda)
 * Question mark galaxy (Messier 51 in Canes Venatici, aka Whirlpool galaxy, Lord Rosse's "Nebula")
 * Quijote (a planet of the star Cervantes, aka Mu Arae)
 * Quintuplet cluster (a dense cluster of massive young stars in Sagittarius) (see also: Arches cluster, Pistol nebula, Pistol star)
 * QY Carinae cluster (my own name for open star cluster Vandenbergh-Hagen 90 in Carina)

X

 * X country skis (an asterism in Lacerta/Pegasus, aka LTA-2)
 * Xi 1 + Xi 2 Centauri galaxy (my own name for NGC 4945/NGC 4945-A in Centaurus)
 * Xihe (the star HD 173416 in Lyra, with planet Wangshu)
 * X marks the spot (an asterism in Telescopium, aka Harrington's STAR 8)
 * X mas tree cluster (open star cluster Messier 103 in Cassiopeia)
 * X Mas tree cluster (open star cluster NGC 2264 in Monoceros) (I call it the 15-S Monocerotis cluster)
 * Xólotl (a planet of the star Axólotl, aka HD 224693 in Cetus)
 * Xolotlan (a planet of the star Cocibolca, aka HD 4208 in Sculptor)
 * XX Ophiuchi (aka Iron star, in Ophiuchus)
 * XY Persei nebula (my own name for the nebula Vandenbergh 24 in Perseus)