Outline of extraterrestrial life

The following outline is provided as an overview of and topical guide to extraterrestrial life:

Extraterrestrial life – is any type of lifeform, from prokaryotes to intelligent beings, that is neither native of Earth or transplanted from it. So far, no extraterrestrial life has ever been found.

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 * Astrobiology
 * Mars
 * Viking lander biological experiments
 * Meteorites
 * Allan Hills 77005
 * Allan Hills 84001
 * Murchison meteorite
 * Nakhla meteorite
 * Shergotty meteorite
 * Yamato 000593
 * Biosignatures
 * Red edge
 * Search for extraterrestrial intelligence
 * Active SETI
 * Allen Telescope Array
 * Pioneer plaque
 * Project Phoenix (SETI)
 * SERENDIP
 * Technosignature
 * Xenoarchaeology
 * Communication with extraterrestrial intelligence
 * Arecibo message
 * Astrolinguistics
 * Wow! signal

Likely requirements

 * Circumstellar habitable zone
 * Extraterrestrial liquid water
 * Planetary habitability

Potential locations

 * Colonization of Europa
 * Habitability of K-type main-sequence star systems
 * Habitability of natural satellites
 * Habitability of red dwarf systems
 * Habitable exoplanet
 * Earth analog
 * Superhabitable planet
 * Life on Mars
 * Life on Titan
 * Life on Venus
 * Catalogs
 * Catalog of Nearby Habitable Systems

Possible traits

 * Extraterrestrial intelligence
 * Alien language
 * Hypothetical types of biochemistry
 * Carbon-based life
 * CHON
 * Extremophile

Ideas

 * Anthropocentrism
 * Carbon chauvinism
 * Copernican principle
 * Cosmic pluralism
 * Drake equation
 * Fermi paradox
 * Aestivation hypothesis
 * Great Filter
 * Rare Earth hypothesis
 * Zoo hypothesis
 * Fine-tuned universe
 * Kardashev scale
 * Dyson sphere
 * Mediocrity principle
 * Potential cultural impact of extraterrestrial contact
 * Exotheology
 * Post-detection policy

Fringe and conspiracy theories

 * Ufology
 * Alien abduction
 * Close encounter
 * Contactee
 * Extraterrestrial hypothesis
 * UFO religion
 * Ancient astronauts

Extraterrestrial life media
Note: Only nonfiction works in this section


 * Books
 * Alien Oceans
 * Cosmos (Sagan book)
 * Evolving the Alien
 * Extraterrestrial: The First Sign of Intelligent Life Beyond Earth
 * Rare Earth: Why Complex Life Is Uncommon in the Universe
 * Documentaries
 * Cosmos: Possible Worlds

Persons influential in extraterrestrial life

 * Giordano Bruno
 * Frank Drake
 * Enrico Fermi
 * Michael H. Hart
 * Stephen Hawking
 * Avi Loeb
 * Carl Sagan
 * Peter Ward

Extraterrestrial life in fiction

 * Extraterrestrials in fiction
 * Alien language in science fiction
 * Ancient astronauts in popular culture
 * List of fictional extraterrestrials
 * List of alien races in DC Comics
 * List of alien races in Marvel Comics
 * List of Star Trek aliens
 * List of Star Wars creatures
 * Archetypes
 * Bug-eyed monster
 * Elder race
 * Energy being
 * Grey alien
 * Insectoid
 * Little green men
 * Plots
 * Alien invasion
 * Big Dumb Object
 * First contact
 * Interstellar war
 * Space warfare in science fiction
 * Space travel in science fiction