Astrophysics (Index)About


(study of extra-terrestrial life)

Astrobiology (or exobiology) is the study of life off of Earth. None has been found so it is a bit speculative. The study includes:

Reasoning out the conditions that might support life is of interest as is the reasoning out the possible signs, i.e., biosignatures. Life is thought to be most likely on a planet or moon when carbon is present, which is the element most likely to be the basis of very large, complex molecules, and when liquid water, a very effective solvent, is present, more likely with both.

Further reading:

Referenced by pages:
carbonate-silicate cycle
mass extinction
NASA Astrobiology Institute (NAI)