PHYS 183 Lecture Notes - Lecture 31: Systematic Chaos, Earth Radius, Olympus Mons
21 Apr 2018
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Sunlight penetrates atmosphere, clouds and heats the surface. Carbon dioxide atmosphere opaque to infrared radiation, so heat is trapped, surface gets hotter. Equilibrium when heat lost via infrared equals that brought in via sunlight. We have greenhouse effect on earth: mostly good. Dopple(cid:396) (cid:396)ada(cid:396) ca(cid:374) study ve(cid:374)us" (cid:396)otation: its clouds are transparent to radio waves. Rotation is retrograde: rotates opposite direction to orbital motion, sun rises in west, sets in east. Rotation axis within 3 degrees of alignment. Essentially all surface at same age: complete resurfacing in past. Venus has active geology like earth; surface 500-800 million years old. But interesting problem: ve(cid:374)us sho(cid:449)s (cid:374)o e(cid:448)ide(cid:374)ce fo(cid:396) plate tecto(cid:374)ics . Planet has long captured our imagination; best studied. Historically because of claims of canals; since disproved. Has co2 ice polar caps that change in morphology. Giovanni schiaparelli 1877: saw canals: straight lines on surface: no photography.
