AST 2002 Lecture Notes - Lecture 23: Ammonia, Ethane, Ammonium Hydrosulfide
Document Summary
Jupiter and saturn have fields created by a layer of metallic hydrogen. Tro(cid:374)g fields, espe(cid:272)iall(cid:455) jupiter (cid:894)20,000(cid:454) as stro(cid:374)g as earth"s fields(cid:895) Uranus and neptune have weaker fields caused by core materials. Causes deflection of objects moving in rotating frame. Example (cid:271)all (cid:862)(cid:272)ur(cid:448)es(cid:863) (cid:449)he(cid:374) thro(cid:449)(cid:374) o(cid:374) a (cid:373)err(cid:455)-go-round. Example weather systems rotate counterclockwise in the northern hemisphere. (cid:271)oth groups for(cid:373)ed like pla(cid:374)ets out of the (cid:862)(cid:373)i(cid:374)i-solar (cid:374)e(cid:271)ulae(cid:863) surrou(cid:374)di(cid:374)g the jo(cid:448)ia(cid:374) large moons planets. Less heating is required to have molten cores. You might think these moons are too small for geology to occur, not true. Terrestrial planets are made mostly of rock. Tidal heating plays a more important role. There is very little erosion due to lack of substantial atmospheres with the exception of. Jupiter"s tidal for(cid:272)es flex io like a ball of silly putty. Sulfur in the lava vaporizes and jets away. Evidence of tectonics and impact cratering is covered. Io gets tidally heated because its orbit is eccentric.
