ASTRO-110 Lecture Notes - Lecture 17: Metallic Hydrogen, Liquid Hydrogen, Ammonium Hydrosulfide
Document Summary
Gaseous hydrogen and helium outside layer, normal pressure, cold temperature. Deeper: density that of water, high pressure, liquid hydrogen from compression. Even deeper: metallic hydrogen, density about that of water, very hot, high pressure (becomes conductive) Metallic hydrogen changes with 100 million times atmospheric pressure original planetesimals (rock, metal, hydrogen compounds), very hot inside. Jupiter is still shrinking releasing gravitational potential energy that is thermalized it radiates more energy than it gets from the sun. Jupiter"s core is 13 times as massive as the entire earth, but is only slightly larger (they have been compressed over time, to a higher density) Jupiter"s core formed first and then (unlike terrestrial) collected its h2 and. Jupiter is about as big as a planet can get. The masses of all 4 protoplanetary cores are nearly the same! Jupiter and saturn captured enough h2 and he to compress their cores to a much smaller size than did uranus and neptune.
