PCS 182 Lecture Notes - Lecture 1: Silly Putty, Tidal Heating, Life On Titan
27 Jul 2017
School
Department
Course
Professor
Document Summary
Pcs 182 lecture notes: sources of heat for a moon: primary star, molten interior, radioactive decay, tidal heating, External sources of water: comets = frozen dirty water come from outer solar system, deuterium (d or 2h) content measured by ir and sub-mm spectroscopy. Comets have high a proportion of d compared to hydrogen = high (d/h: asteroids = small rocky bodies orbiting the sun = leftover fragments from formation of solar system. Meteorites = pieces of primitive asteroids that land on. 60 moons of saturn: atmosphere: 90% n2, 1. 4 % ch4, ar, c2h6, other hydrocarbons, hydrocarbons consist only of hydrogen and carbon. Atmosphere is 200 km high and denser than earth"s protects surface against solar radiation. Cassini-huygens mission: spacecraft sent to saturn system, cassini performed flybys, 2005: huygens probe dropped to titan. Aerial views hills and forking channels carved by liquid methane and ethane?: smoggy chemically active atmosphere produced by outgassing (???) from titan"s interior.
