AST251H1 Lecture : lecture note
6 Feb 2012
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Extinction, documentation bias microborial vs large life extinctions, differecnces in the. Extinctions, locations size scope etc how they effected evolution etc. Planet hunting, research ways in which researhing and impications of extra solar life, Back in 80s 1 and 2 planets a year good, now 2011 200 planets in 2011 alone tons of info. On exo planets, due to kepler space tele, space of sky watch stars for transit events, In the news, search for aliens in on again now getting money, Hadeon eon, hellish first of 4 subdivions of history of earth. Hadeon record preserved in the moon, high regions craters and the black is molten lava floding the craters, high land craters, marianas are lavas. 3. 8 billion yeas the moon surface undisturbed, not just moon but mercury does as well, heave bombardent stage. Moon formed after earth formed, and crashed off material which condensed, moon quite similar to mantle of earth therefore earth differentiated,
