User:Iceblock/Oxford Dictionary of Astronomy/Red links

A
-> cosmic-ray shower -> cosmic-ray shower
 * Abell radius
 * ablation age
 * A-class asteroid
 * acronical
 * active prominence
 * Adams Ring
 * advance of perihelion
 * afocal
 * Alexandra family
 * Alfvén surface
 * Algol star
 * all-sky camera
 * Alpha Capricornid meteors
 * Alpha Cygnid meteors
 * Alpha Cygni star
 * Alpha Scorpiid meteors
 * aluminizing
 * Amor group
 * anaemic spiral galaxy
 * anastigmatic
 * Andromedid meteors
 * annual equation
 * annual inequality -> annual equation
 * annual parallax
 * annual variation
 * anomalous Cepheid
 * anomalous iron
 * anthelion radiant
 * anticentre -> galactic anticentre
 * anti-dwarf nova
 * ap-
 * apo-
 * aperture ratio
 * apocentre
 * apparent noon
 * apparent retrogression
 * apparent sidereal time
 * apsidal motion
 * Aquarid meteors
 * aqueous alteration
 * Arago ring
 * arch filament system
 * area photometer
 * Comet Arend–Roland (C/1956 R1)
 * areo-
 * Argelander step method
 * argon–potassium method -> potassium–argon method
 * Ariel satellites
 * Aristarchos Telescope
 * AR Lacertae star
 * arm population
 * astration
 * astronomical triangle
 * astrum
 * Aten group
 * ATNF ->
 * auroral oval
 * ATNF

B
-> Barycentric Celestial Reference System -> Beta Cephei star -> Algol star
 * Baade–Wesselink method
 * Bailey type
 * Baker–Schmidt telescope
 * barn-door mount ->
 * Barnes–Evans relationship
 * Barycentric Celestial Reference System
 * baryon star
 * basaltic achondrite
 * Muammad ibn Jabir al-Battani
 * Ba II star ->
 * Bautz–Morgan class
 * B-class asteroid
 * beat Cepheid
 * Becklin–Neugebauer Object (BN Object)
 * Comet Bennett (C/1969 Y1)
 * bent-pillar mounting
 * Berkeley–Illinois–Maryland Association Array (BIMA Array)
 * Besselian day numbers
 * Beta Cephei star
 * Beta Taurid meteors
 * Bethe–Weizsäcker cycle -> carbon–nitrogen cycle
 * Bianchi cosmology
 * Comet 3D/Biela
 * Bielid meteors -> Andromedid meteors
 * billitonite
 * BIMA Array
 * binary galaxy
 * bipolar group
 * BL Herculis star
 * bloomed lens
 * blue clearing
 * Blue Planetary
 * blue populous cluster ->
 * B magnitude
 * BN Object ->
 * Bartholomeus Jan Bok
 * Bartholomeus 'Bart' Jan Bok
 * bound–bound transition
 * bound–free transition
 * Bouwers telescope
 * Bowen fluorescence
 * Bragg crystal spectrometer
 * bridge (astronomy)
 * broad-band photometry
 * Comet 16P/Brooks 2 -> Jupiter comet family
 * Budrosa family
 * bump Cepheid
 * burst (astronomy)
 * Butcher–Oemler effect
 * Butler matrix
 * BV photometry
 * Bw star
 * BY Draconis star

C
-> carbon–nitrogen cycle -> Celestial Intermediate Reference System -> carbon–nitrogen–oxygen cycle -> Córdoba Durchmusterung
 * Cape photometry
 * Cape RI photometry -> Kron–Cousins RI photometry
 * Capricornid meteors
 * Carafe Galaxy
 * carbon flash
 * carbon–nitrogen cycle (CN cycle)
 * Carrington heliographic coordinates
 * cataclysmic binary
 * catalogue equinox
 * CCD spectrometer
 * C-class asteroid
 * celestial axis
 * Celestial Intermediate Reference System
 * Centaur group
 * central peak
 * centre of inertia
 * CfA ->
 * Chandler period
 * Chandrasekhar-Schönberg limit
 * chopping secondary
 * chromospheric network
 * circular velocity
 * circumstellar maser
 * circumstellar matter
 * Cirrus Nebula ->
 * C line
 * clock star
 * cluster, star ->
 * CM relation -> colour–magnitude relation
 * CN band
 * CN cycle -> carbon–nitrogen cycle
 * CN star
 * cocoon star
 * cold camera
 * collimation error
 * Colombo Gap
 * colour excess
 * colour–luminosity relation -> colour–magnitude relation
 * colour–magnitude relation
 * cometary coma
 * optical coma
 * Coma–Virgo Cluster ->
 * comet family
 * compact galaxy
 * compact source
 * comparison spectrum
 * composite-spectrum binary
 * Compton upscattering ->
 * Concordia family
 * stellar convection
 * convective envelope
 * convective equilibrium
 * convergent point
 * cooled camera -> cold camera
 * coorbital
 * Copernicus satellite
 * Córdoba Durchmusterung
 * coronal bright point
 * coronal condensation
 * coronal lines
 * coronal plume
 * co-rotation
 * corrector plate
 * correlation detection
 * cosmic-ray shower
 * cosmic texture
 * cosmological distance scale
 * Cosmos satellites
 * Couder telescope
 * c.p.m. ->
 * crêpe ring
 * cross-axis mounting
 * crossing time
 * cross-wire micrometer
 * curve of growth
 * cusp gap
 * Cybele group
 * cyclotron maser

D
-> cometary tail
 * Danjon astrolabe
 * Raymond Davis, Jr
 * day number
 * D-class asteroid
 * DDO classification
 * DDO photometry
 * Comet de Chéseaux (C/1743 X1)
 * declination axis
 * dedispersion
 * deflection of light
 * Delta Aquarid meteors
 * Delta Cepheid star ->
 * Delta Delphini star
 * density wave
 * dew cap
 * D galaxy
 * Dicke switch
 * dielectronic recombination
 * diffraction rings
 * Dirac cosmology
 * dish antennae
 * disk population
 * diurnal aberration
 * diurnal inequality
 * dMe star
 * Comet Donati (C/1858 L1)
 * dopplergram
 * Double Double
 * double-lined binary
 * double-mode variable
 * Draconid meteors -> Giacobinid meteors
 * drawtube
 * drifting sub-pulse
 * dwarf variable
 * Dwingeloo galaxy

E
-> Aten group -> Amor group -> Earth rotation angle
 * early-type galaxy
 * Earth-approaching asteroid
 * E-class asteroid
 * ecliptic limits
 * Edgeworth–Kuiper Belt ->
 * Effelsberg Radio Observatory
 * electron scattering opacity
 * optical element
 * Ellerman bomb
 * ellipsoidal variable
 * elliptic aberration -> E-terms
 * Comet 2P/Encke
 * envelope (astronomy)
 * Ep galaxy
 * e-process
 * equation (astronomy)
 * equation of light
 * equation of the equinoxes
 * equation of the origins
 * equatorial horizontal parallax
 * eruptive binary
 * eruptive prominence
 * Eta Aquarid meteors
 * E-terms
 * evolved star
 * exit cone
 * EX Lupi star
 * EXor -> EX Lupi star
 * exposure age
 * extended source
 * extragalactic nebula ->
 * extreme Population I star

F
-> plages
 * Fabry lens
 * Fanaroff–Riley class
 * fast nova
 * Faulkes Telescopes
 * F-class asteroid
 * fibrille
 * field flattener
 * field star
 * 53 Persei star
 * filamentary nebula
 * filled aperture
 * filled-centre supernova remnant ->
 * filtergram
 * Fish Mouth
 * FK Comae Berenices star
 * Flamsteed numbers
 * flash spectrum
 * flash star
 * polar flattening
 * Flora group
 * flux collector
 * orbital focus
 * footpoint ->
 * four-colour photometry ->
 * Fp star
 * fractional method
 * Franklin-Adams charts
 * free–bound transition
 * free–free transition
 * fringe pattern
 * full-wave dipole
 * fundamental catalogue
 * fundamental star
 * fuor ->
 * future light cone ->

G
-> Greenwich Mean Astronomical Time
 * galactic anticentre
 * galactic magnetic field
 * galactic rotation
 * galactic window
 * galaxy cannibalism
 * galaxy encounter
 * Galileo National Telescope
 * Galle Ring
 * Gamma Cassiopeiae star
 * Gamma Doradus star
 * gamma-ray background
 * Sergei Illarionovich Gaposchkin ->
 * gas scintillation proportional counter
 * gas tail -> cometary tail
 * G-class asteroid
 * GCRS -> Geocentric Celestial Reference System
 * Geminid meteors
 * Geneva photometry
 * Geocentric Celestial Reference System
 * geocentric equatorial parallax
 * geometrical libration -> optical libration
 * Giacobinid meteors
 * Comet 21P/Giacobini–Zinner
 * giant branch
 * GMST -> Greenwich Mean Sidereal Time
 * GoTo telescope
 * interplanetary grains
 * interstellar grains
 * grating spectrometer
 * gravitational deflection
 * grazing-incidence telescope
 * greatest brilliancy
 * greatest elongation
 * Great September Comet (C/1882 R1)
 * Greenwich hour angle
 * Greenwich Mean Astronomical Time
 * Greenwich Mean Sidereal Time
 * Greenwich sidereal date
 * Comet 26P/Grigg–Skjellerup
 * grooved terrain
 * guide telescope
 * gyrosynchrotron radiation

H
-> Hickson compact group -> Ramaty High-energy Solar Spectroscopic Imager -> High Energy Transient Explorer-2 -> 21-centimetre line
 * HAEBE ->
 * Comet Hale–Bopp (C/1995 01)
 * Hale's law -> bipolar group
 * Halley-family comet
 * atmospheric halo
 * halo CME
 * halo population
 * Haro galaxy
 * Hartmann test
 * Harvard Revised Photometry
 * cometary head
 * head–tail galaxy
 * heavy-metal star
 * heli- ->
 * helio- ->
 * heliacal rising and setting
 * heliocentric coordinates
 * heliocentric latitude
 * heliocentric longitude
 * heliocentric parallax -> annular parallax
 * heliographic coordinates
 * Helmholtz–Kelvin contraction
 * hemispherical albedo
 * Karoline Lucretia Herschel ->
 * Comet 35P/Herschel–Rigollet
 * Hickson compact group
 * hierarchical cosmology
 * high-energy astrophysics
 * High-Energy Transient Explorer-2
 * high-speed photometry
 * Hind's Variable Nebula
 * H magnitude
 * Hoba West meteorite
 * Holmberg radius
 * horizontal coordinates
 * horizontal refraction
 * hot Big Bang
 * HPBW ->
 * HR number
 * H20 maser
 * Hubble–Sandage variable
 * Hendrik ('Henk') Christoffel van de Hulst
 * hummocky terrain
 * Huygens Gap
 * Comet Hyakutake (C/1996 B2)
 * hydrogen emission region
 * hyperbolic velocity
 * hypersensitization
 * hypersthene achondrite ->
 * HZ43

I
-> interstellar absorption -> inverse Compton effect -> atmospheric transparency -> Image Photon Counting System -> International Sun–Earth Explorer ->
 * Comet Ikeya–Seki (C/1965 S1)
 * Comet Ikeya–Zhang (153P/)
 * Image Photon Counting System
 * imaging photometer -> area photometer
 * I magnitude
 * impersonal astrolabe -> Danjon astrolabe
 * inertial coordinate system
 * infall velocity
 * infrared photometry
 * infrared source
 * Innisfree meteorite
 * integration time
 * interacting binary
 * intergalactic absorption
 * intergalactic magnetic field
 * intermediate-band photometry
 * intermediate-population star
 * intermediate-type star
 * International Sun–Earth Explorer
 * International Years of the Quiet Sun
 * interpulse
 * interstellar absorption
 * interstellar molecule
 * interstellar scintillation
 * intrinsic colour index
 * inverse Compton effect
 * inverse P Cygni profile -> P Cygni profile
 * iodine cell
 * ionization equilibrium
 * ionization front
 * ionopause
 * ion tail -> cometary tail
 * Iota Aquarid meteors
 * IQSY -> International Years of the Quiet Sun
 * Comet IRAS–Araki–Alcock (C/1983 H1)
 * ISO (observatory) ->
 * isophotal wavelength
 * isothermal region

J

 * (Pierre) Jules César Janssen
 * jet (astronomical objects)
 * Jilin meteorite
 * J magnitude
 * Johnson photometry
 * Jupiter–family comet

K
-> Jewel Box cluster
 * Kappa Cygnid meteors
 * Kapteyn Selected Areas
 * Lord (William Thomson) Kelvin
 * Kelvin–Helmholtz contraction -> Helmholtz–Kelvin contraction
 * Kids (asterism)
 * kinematic parallax
 * kinetic temperature
 * Kirin meteorite -> Jilin meteorite
 * Kleinmann–Low Nebula
 * KL Nebula -> Kleinmann–Low Nebula
 * K magnitude
 * knife-edge test ->
 * Comet Kohoutek (C/1973 E1)
 * König eyepiece ->
 * Kracht group
 * Kramers opacity
 * Kron–Cousins RI photometry
 * Kruskal diagram

L
<-> -> flux collector -> lunar inequality
 * Joseph Louis de Lagrange(-Tournier)
 * l'Aigle meteorite shower
 * Joseph Jérôme (Le Français) de Lalande
 * Lambda Eridani star
 * Lassell ring
 * last contact
 * late-type galaxy
 * latitude variation
 * least circle of confusion -> ->
 * Lemaître universe
 * Leonid meteors
 * lepton era
 * Leto family
 * Le Verrier Ring
 * Comet Lexell (D/1770 L1)
 * light time
 * line of inversion -> magnetic inversion line
 * line ratio
 * line receiver
 * line wing
 * lithium star
 * lithosiderite ->
 * Little Dumbbell
 * L magnitude
 * lobate ridge
 * local arm
 * local bubble
 * Lockman hole
 * (Joseph) Norman Lockyer
 * long-baseline interferometry
 * longitude at the epoch
 * longitude of perigee
 * (Alfred Charles) Bernard Lovell
 * low-luminosity star
 * low-velocity star
 * luminosity evolution ->
 * luminosity–volume test
 * luminous arc
 * Luna (Moon probes)
 * lunar inequality
 * Willem ('William') Jacob Luyten
 * Lyman-α forest
 * Lyman-break Galaxy

M
-> meridian transit -> ->  -> Mercury Surface, Space Environment, Geochemistry, and Ranging <-> -> Ellerman bomb
 * macrospicules
 * macroturbulence
 * Maffei Galaxies
 * magnetic inversion line
 * magnetic variable
 * Malin-1
 * manganese–mercury star -> mercury–manganese star
 * manganese star
 * mare (astronomy)
 * Mariner Valley ->
 * Marsden group
 * Mars Odyssey (2001 Mars Odyssey)
 * Mars probes
 * maser amplifier
 * mass discrepancy
 * mass loss
 * mass–radius relation
 * (Edward) Walter Maunder
 * maximum-entropy method
 * Maxwell Telescope ->
 * Mayall Telescope
 * McIntosh scheme ->
 * M-class asteroid
 * mean daily motion
 * mean density of matter
 * mean equator
 * mean equinox
 * mean parallax -> statistical parallax
 * mean place
 * mean pole
 * mean position -> mean place
 * medium-band photometry
 * Melipal
 * meniscus Schmidt telescope
 * mensa (planets)
 * Mercury Surface, Space Environment, Geochemistry, and Ranging
 * terrestrial meridian
 * meridian astronomy
 * meridian transit
 * Charles Joseph Messier
 * Me star
 * metal-rich star
 * meteor stream
 * methanol maser
 * Meyer group
 * micrometer (measuring instrument)
 * micropore optics
 * microvariable
 * millimetre-wave astronomy
 * millimetre waves
 * Mills cross
 * Milne–Eddington approximation
 * Rudolph Leo Bernhard Minkowski
 * Mittenzwey eyepiece
 * MK classification -> Morgan–Keenan classification
 * MKK classification -> Morgan–Keenan classification
 * M magnitude
 * mock Moon -> parselene
 * molecular line
 * MONET -> Monitoring Network of Telescopes
 * Monitoring Network of Telescopes
 * monocentric eyepiece
 * monochromatic magnitude
 * Monogem Ring
 * mons (planets)
 * Morgan–Keenan classification
 * Morgan's classification
 * Mount Stromlo and Siding Spring Observatories
 * Mount Wilson classification ->
 * M region
 * MSSSO -> Mount Stromlo and Siding Spring Observatories
 * MS star
 * Mu Cephei star
 * multi-beam receiver
 * multi-ringed basin ->

N
->  -> north polar distance -> New Style date
 * Nal detector
 * Nançay Radio Astronomy Observatory
 * narrow-band photometry
 * Nasir Eddin ->
 * Nasser Eddin ->
 * nebula filter
 * nebular line
 * nebular variable
 * negative eyepiece
 * neutral hydrogen line -> 21-centimetre line
 * New Style date
 * Newtonian–Cassegrain telescope
 * Newtonian focus
 * N galaxy
 * night sky brightness
 * N magnitude
 * non-baryonic matter
 * non-gravitational force
 * non-radial pulsation
 * non-thermal radiation
 * normal astrograph
 * North Galactic Spur
 * north polar distance
 * nova-like variable
 * nuclear time-scale
 * number evolution ->
 * nutation in right ascension -> equation of the equinoxes

O
->
 * oblique rotator
 * Observatoire du mont Mégantic
 * occulting bar
 * OC star
 * Oe star
 * off-axis guider
 * Of star
 * OH–IR source
 * OH line
 * OH maser
 * Oljato (asteroid)
 * O magnitude
 * ON star
 * Oosterhoff group
 * Ootacamund Radio Astronomy Centre
 * Ophiuchid meteors
 * Oppenheimer–Volkoff limit
 * optical libration
 * Orion Association
 * Orionid meteors
 * Orion Molecular Clouds
 * overtone mode
 * oxygen burning

P
-> Third Earl of Rosse -> S Doradus star -> -> cometary tail -> -> meridian astronomy <-> -> photographic zenith tube
 * parabolic comet
 * parabolic velocity
 * parallactic ellipse
 * parallactic inequality
 * parallactic motion
 * parselene
 * past light cone ->
 * P-class asteroid
 * P Cygni line profile
 * periastron effect
 * pericentre
 * time of perihelion passage
 * period–age relation
 * period–colour relation
 * period–density relation
 * periodic perturbation
 * period–luminosity–colour relation
 * period–luminosity relation
 * period–mass relation
 * period–radius relation
 * period–spectrum relation
 * Petzval surface
 * phase defect
 * phase rotator
 * Phillips bands
 * Phobos probes
 * Phoenicid meteors
 * Phoenix (Mars lander)
 * Pholus (asteroid)
 * photocentre
 * photoelectric magnitude
 * photoelectric photometer
 * photographic amplification
 * photographic zenith tube
 * photoheliograph
 * photometric standard -> standard star
 * photopolarimeter ->
 * photovisual magnitude
 * photovoltaic detector
 * physical albedo ->
 * physical double
 * physical libration
 * Pickering Series
 * Pico Veleta
 * Piscid meteors
 * Piscis Austrinid meteors
 * planoconcave lens
 * planoconvex lens
 * Plateau de Bure
 * plate centre
 * plate constants
 * plate-measuring machine
 * PLC relation -> period–luminosity–colour relation
 * Plössl eyepiece
 * Plough (asterism)
 * PL relation -> period–luminosity relation
 * P magnitude
 * Pogson scale
 * Pogson step method
 * (Jules) Henri Poincaré
 * polar axis
 * polar flattening
 * polar plume -> coronal plume
 * polar sequence
 * position-angle effect
 * positive lens ->
 * post-nova
 * potassium–argon method
 * potential hazardous asteroid
 * preceding
 * precession constant
 * precursor pulse
 * pre-nova
 * Príbram meteorite
 * primary cosmic ray
 * primary minimum
 * primordial fireball
 * primordial galaxy
 * prismatic astrolabe
 * prominence spectroscope
 * proton–proton reaction
 * p-spot
 * pulsation mode
 * pulse broadening
 * pulse profile
 * Pup (Sirius B)
 * Puppid–Velid meteors
 * PV Telescopii star

Q

 * Q-class asteroid
 * Q magnitude
 * QSS -> quasi-stellar radio source
 * Quadrantid meteors
 * quasi-stellar radio source
 * quiescent prominence

R
-> free–bound transition -> radioactive age dating -> richest-field telescope -> Ramaty High-Energy Solar Spectroscopic Imager
 * radar meteor
 * radial pulsation
 * radial-velocity spectrometer
 * radiation laws -> ->  ->
 * radiation temperature
 * radioactive age dating
 * radioheliograph
 * radio jet ->
 * radio meteor
 * radius–luminosity relation
 * Ramaty High-Energy Solar Spectroscopic Imager
 * Ranger (Moon probes)
 * Ra-Shalom (asteroid)
 * R association
 * RAS thread
 * Rayleigh–Jeans formula
 * crater rays
 * R Canis Majoris star
 * R-class asteroid
 * recombination epoch
 * recombination line
 * recycled pulsar
 * redshift–distance relation
 * redshift–magnitude relation
 * reduced proper motion
 * red variable
 * reference star
 * reflectance spectrum
 * reflection effect
 * reflection variable
 * regression of nodes
 * relative orbit
 * relativistic velocity
 * resonance line
 * resonant scattering
 * reticulum (planets)
 * reversing layer
 * RGU photometry
 * Rho Cassiopeiae star
 * Rho Ophiuchi Nebula
 * richest-field telescope
 * rille (Moon)
 * ring arcs
 * R magnitude
 * Ole Christensen Römer
 * Olaus Christensen Römer -> Ole Christensen Römer
 * Rood–Sastry type
 * Rosat
 * Third Earl of Rosse <->
 * Bruno Benedetto Rossi
 * Rossiter effect
 * rotation effect -> Rossiter effect
 * RRs variable ->
 * RR Telescopii star
 * RS Canum Venaticorum star
 * Russell–Vogt theorem -> Vogt–Russell theorem
 * RW Aurigae star

S
-> South African Large Telescope -> Solar, Anomalous, and Magnetospheric Particle Explorer -> Small Astronomy Satellite -> Chandrasekhar–Schönberg limit -> Southern Astrophysical Research telescope
 * Salpeter function ->
 * SAO Catalog ->
 * scatter ellipse
 * Schechter function
 * Schröter effect
 * (Samuel) Heinrich Schwabe
 * Schwarzschild telescope
 * Comet 29P/Schwassmann–Wachmann 1
 * S-class asteroid
 * Sco-Cen Association
 * SC star ->
 * S Doradus star
 * SDSS photometry
 * Seashell Galaxy
 * (Pietro) Angelo Secchi
 * secondary cosmic ray
 * secondary minimum
 * secular acceleration
 * secular parallax
 * secular perturbation
 * secular variable
 * selected areas -> Kapteyn Selected Areas
 * selective absorption
 * Selene (Moon probe)
 * self-absorption
 * semi-forbidden line ->
 * Shack–Hartmann test -> Hartmann test
 * shadow transit
 * shell burning
 * shell galaxy
 * Comet Shoemaker–Levy 9 (D/1993 F2)
 * short-period variable
 * Sickle (asterism)
 * sidereal rate
 * siderophyre
 * Sikhote–Alin meteorite
 * single-lined binary
 * SiO maser
 * six-colour system
 * Earl Carl Slipher
 * slow nova
 * slow pulsator
 * Small Astronomy Satellite
 * Smithsonian Astrophysics Observatory
 * Smithsonian Astrophysics Observatory Star Catalog
 * SNC meteorites
 * soft gamma-ray repeater
 * Solar, Anomalous, and Magnetospheric Particle Explorer
 * solar antapex
 * solar interior
 * solar motion
 * solar–terrestrial relations
 * solid Schmidt telescope
 * Southern Reference Stars
 * South Pole Aitken Basin
 * space motion
 * space reddening -> interstellar absorption
 * spec. ->
 * spectroheliogram
 * spectrum binary
 * spectrum variable ->
 * spherical albedo ->
 * spinar
 * spin temperature
 * Lyman Spitzer, Jr
 * sporadic meteor
 * Gustav Friedrich Wilhelm Spörer
 * Springfield mounting
 * standard epoch
 * standard star
 * statistical parallax
 * step method -> Argelander step method -> Pogson step method
 * stereo comparator
 * Stonyhurst heliographic coordinates
 * strontium star
 * subluminous star
 * sublunar point
 * sub-pulse
 * Abd al-Raman al-Sufi
 * Sunflower galaxy
 * sunskirter
 * superhump ->
 * superluminal velocity
 * supermaximum ->
 * super-rotation
 * super-Schmidt telescope
 * supersynthesis
 * surge prominence
 * Surveyor (space probes)
 * S Vulpeculae star
 * Swift (satellite)
 * Comet 109P/Swift–Tuttle
 * Sword Hand of Perseus
 * SX Arietis star
 * SX Phoenicis star
 * syndyname
 * Systems I, II, and III

T
-> -> Temps Dynamique Barycentrique -> -> Galileo National Telescope
 * cometary tail
 * T association
 * Taurus Molecular Clouds
 * Taurus Moving Cluster
 * Taurus X-1
 * T-class asteroid
 * Teapot (asterism)
 * Comet Tebbutt (C/1861 J1)
 * tele-extender
 * telescope drive ->
 * telescope mounting ->
 * Comet 55P/Tempel–Tuttle
 * temperature minimum
 * terrestrial age
 * thermal bremsstrahlung -> free–free transition
 * thinned chip
 * third quarter ->
 * three-colour photography ->
 * three-colour photometry -> Johnson photometry
 * three-kiloparsec arm
 * tidal evolution
 * time of perihelion passage
 * TiO bands
 * tip–tilt mirror
 * topocentric
 * Toro (asteroid)
 * total magnitude ->
 * train (meteors)
 * transfer lens
 * meridian transit
 * atmospheric transparency
 * Trapezium (star)
 * trischiefspiegler ->
 * true equator
 * true equinox
 * true pole
 * Trumpler star
 * Tully–Fischer relation
 * tuning-fork diagram
 * Comet 41P/Tuttle–Giacobini–Kresák
 * 21-centimetre line
 * two-colour diagram
 * two-colour photometry -> BV photometry
 * Two-Micron All-Sky Survey
 * two-spectrum binary -> composite-spectrum binary

U
-> UKIRT Infrared Deep-Sky Survey -> United Kingdom Schmidt Telescope -> Universel Temps Coordonné ->
 * UBV photometry -> Johnson photometry
 * UBVRIJKL photometry -> Johnson photometry
 * U-class asteroid
 * UKIDSS photometry
 * UKIRT Infrared Deep-Sky Survey
 * ultraviolet excess star
 * ultraviolet photometry
 * U magnitude
 * Undina family
 * unfilled aperture
 * United Kingdom Schmidt Telescope
 * Upsilon Sagittarii star
 * Ursid meteors
 * UU Herculis star
 * uvby system ->
 * UV Persei star
 * UXor -> UX Orionis star
 * UX Orionis star
 * UX Ursae Majoris star

V
-> Very Energetic Radiation Imaging Telescope Array System
 * Valhalla (impact basin)
 * variation of latitude -> latitude variation
 * VBLUW photometry -> Walraven photometry
 * V-class asteroid
 * Vega probes
 * velocity–distance relation
 * Very Energetic Radiation Imaging Telescope Array System
 * very slow nova -> RR Telescopii star
 * Viking (space probes)
 * VILGEN photometry
 * Vilnius photometry
 * Virginid meteors
 * Hermann Carl Vogt
 * Vogt–Russell theorem
 * Voyager (space probes)
 * VV Cephei star -> Zeta Aurigae star
 * VV Sculptoris star

W
-> H2O maser -> Wide Field Infrared Survey Explorer -> Algol star
 * walled plain
 * Walraven photometry
 * Water Jar
 * weird terrain
 * Werner lines
 * Comet West (C/1975 V1)
 * white-light corona
 * Wide Field Infrared Survey Explorer
 * Wielen dip
 * Wild's Triplet
 * Comet 107P/Wilson–Harrington
 * Wind (satellite)
 * Maximilian ('Max') Franz Joseph Cornelius
 * (Johann) Rudolf Wolf
 * Wolf diagram
 * Wolf–Lundmark–Melotte system
 * Wolf sunspot number
 * Wright telescope
 * WZ Sagittae star

X

 * X-ray bright point -> coronal bright point
 * X-ray calorimeter

Y

 * Yepun
 * Yerkes system
 * Y magnitude
 * YY Orionis star

Z
-> Zodiacal Catalogue
 * ->
 * Z Andromedae star
 * zenithal attraction
 * zero-age horizontal branch
 * Zeta Aurigae star
 * zirconium star ->
 * Z magnitude
 * Zodiacal Catalogue
 * zone catalogue
 * zone time
 * Zürich relative sunspot number ->