+"Alien species" denotes any form of [Extraterrestrial Life](/wiki/extraterrestrial_life) not native to Earth. Their potential characteristics and impact on cosmic [Ecology](/wiki/ecology) are central subjects within [Planetary Science](/wiki/planetary_science) and astrobiology.
+## See also
+- [Exoplanet](/wiki/exoplanet)
+- [Astrobiology](/wiki/astrobiology)
+- [Space Exploration](/wiki/space_exploration)
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