NATS 1880 Lecture Notes - Lecture 9: Giovanni Domenico Cassini, Galilean Moons, Giant Planet
25 Jun 2017
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Jupiter (67+), saturn (62+), uranus (27+), neptune (at least 13) [5 k km - couple km] Uranus: only jovian planet with non habitable moons. 6 most habitable: europa likely ganymede unlikely callisto unlikely (j) - enceladus likely & titan rare (s) - triton unlikely (n) * earth"s largest sub-glacial lake: lake vostok, antarctica. Earth amino acids: left handed - what about titan, etc? (50/50 split in meteorites) : molecular level favours left-handed vs. right-handed for rst cells. * mass of 1 cubic meter of water: 1000 kg (1 tonne) At least 170 moon among the 4 jovian planets. Galilean moons of jupiter: 1610 discovered 4 (+ ganymede, callisto, io, europa -) * Christiaan huygens: titan (saturn"s largest moon) 1656. Lassell: 1846; discovered triton (neptune"s largest moon) Giovanni domenico cassini: discovered 4 more saturn moons. Same direction as planets spin = formed as mini solar systems. Smaller moons: irregular shape (less gravity pull) & highly elliptical orbits around host.
