Extraterrestrial life
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Extraterrestrial life, or alien life, is life that originates from another world rather than on Earth. No extraterrestrial life has yet been detected. Such life might range from simple forms such as m
Besides Earth, Mars, Europa and Enceladus are the most likely places in the Solar System to find life.
Lifeforms produce a variety of biosignatures that may be detectable by telescopes.
The Green Bank Telescope is one of the radio telescopes used by the Breakthrough Listen project to search for alien communications.
Artist's impression of Gliese 581 c, the first terrestrial extrasolar planet discovered within its star's habitable zone
Planetary habitability
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Planetary habitability is a measure used in astrobiology to characterize a planet's or a natural satellite's potential to develop and sustain an environment hospitable to life. The Planetary Habitabil
Understanding planetary habitability is partly an extrapolation of the conditions on Earth, as this is the only planet known to support life.
The moons of some gas giants could potentially be habitable.
An artist's impression of GJ 667 Cc, a potentially habitable planet orbiting a red dwarf constituent in a trinary star system
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