ASTRON 2B03 Lecture Notes - Lecture 8: Breakthrough Listen, Biosignature, Extremophile
6 Dec 2017
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Document Summary
Species diversity decreases drastically during a mass extinction. But if not total, recovery can be rapid and leads yo increased diversity many new ecological niches to be filled anew. Why is there life on earth: location, location, location, timing, atmosphere not too little not too much, water not too little not too much (?, global climate, impacts, supernovae. Currently looking for evidence of past or present: planned sample return missions. Mars-like places on earth (mars simulation lab) Parts of surface of mars, ice can actually melt where water can run on mars. Mars is going to get warmer, in the future it might be more habitable. Liquid water possible exists beneath the (cid:373)oo(cid:374)(cid:859)s icy surface. Hst recently observed plumes of water as europa transited in front of jupiter! Been described as having conditions similar to those of early earth. Has liquid lakes on its surface (probably composed of ethane/methane) May also have water beneath the surface.
