Earth Sciences 1086F/G Lecture Notes - Lecture 14: Solar Wind, Galilean Moons, Tidal Locking
3 Jul 2020
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Large, low density planets composed of h, he, li, m and ammonia in gas or liquid state. Jupiter, saturn, uranus, neptune: all have atmosphere of h, he (more h then he) Jupiter/saturn, b/w atmos and body is gradual: gas to liquid. Rocks: silicate minerals and metals: outermost atmos of all 4 consist of h, he (less, jupiter/saturn state changes from gas to liquid and then metal . Pressure on interiors so immense that h starts responding to stimuli exactly as metal would: uranus/neptune, atmos of methane, further down semi-solid (ice) of water, methane and ammonia. Origin of gas giants: all volatile and liquid elements that would have been given off by early star would gather quickly into frozen blobs in cold outer reaches of system. Grow anf gravitational attraction increase and pull in quantities: neptune pass protoplanet to uranus, uranus to saturn, to jupiter which could assimilate it or toss to sun.
