AST101H1 Lecture Notes - Lecture 10: Orbital Eccentricity, Solid Nitrogen, Galilean Moons
18 Apr 2018
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Tiny solid cores buried under thick layers of liquid and gas. Pressure is extremely high - 100 million atmosphere. So much pressure is that things that would be gas turn to metals. Hydrogen with other gases and clouds on top. Ends up being around the same size as jupiter. Diameter or rings is over 260,000, butt less than 0. 1 km thick. Pulls ring particle backward and slows it down. Shepherd moons work together to produce very narrow rings. Tidal forces near the planet prevent small moonlets form accreting into larger moons. Close to planes, tidal forces become stronger than self-gravity. So there can"t be large moons close to planets. Rings are made up of many particles of almost moons. Rotation of uranus is tipped on its side, compared to the planet of the ecliptic. Molten rock from the upper mantle makes its way to the surface. Temperature changes, etc. , can put stress on planet"s crust.
