EAE1011 Lecture Notes - Lecture 23: Magnetism, Dwarf Planet, Outer Core
10 Aug 2018
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Rocky planets in our solar system: 1. mercury, 2. venus, 3. earth -luna (the moon) Innermost planet: rocky basaltic crust, high in fe, ni, trace atmosphere of h and he, gravitationally locked to the sun so that one day on mercury lasts two years. Surface temp varies from 100-700 k, with average of 452 k. Earth and moon (terra and luna: earth (terra, third planet, rocky basalt and granite crust, over mg and fe-rich mantle, over fe-ni core, n 2and o2atmosphere, water at surface in frozen, liquid, and gaseous phases. Surface temp varies from 260310 k, with average of 281 k: binary planet system with one large moon (luna, each body orbits the other. Luna (moon: rocky basaltic crust, no atmosphere, tidally locked so one face always faces the earth ( 15 , thin basaltic crust, over thick basaltic mantle, over solid core. Core mass is <4% of moon mass, (cid:272)ore is (cid:373)ostly (cid:271)asalti(cid:272) as well .
