exobiology

n. study of the possibility of life on other planets

This article is about the scientific discipline. For the journal, see Astrobiology (journal). Astrobiology (from Greek: ἀστρο, astro, "constellation"; βίος, bios, "life"; and λόγος, logos, "knowledge") is the  interdisciplinary study of life in space, combining aspects of astronomy, biology and geology. It is focused primarily on the study of the origin, distribution and evolution of life. It is also known as exobiology (from Greek: έξω, exo, "outside"). The term "Xenobiology" has been used as well, but this is technically incorrect because its terminology means "biology of the foreigners".
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Noun
1. the branch of biology concerned with the effects of outer space on living organisms and the search for extraterrestrial life
(synonym) space biology, astrobiology
(hypernym) biology, biological science