Earth Sciences 1086F/G Lecture Notes - Lecture 16: Kuiper Belt, Stellar Atmosphere, Escape Velocity
3 Jul 2020
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Jupiter/saturn gas giants and uranus/neptune ice giants : uranus/neptune twins. William herschel: spotted object which he initially thought comet but after realize planet: continental astronomers insisted new planet not named after english king. Studying orbit of uranus more closely, astronomers realized orbit affected by presence of neptune. Adams: determine variation in position of uranus and calculating when exact deviation from. Newtons laws indicated properties of next planet out: calculated orbit and position of undiscovered planet, lack access of telescope. Urbain jean le verrier: made same calculations independently (lack telescope) Voyager 2: flyby, no craft has come close enough. Internal structure: core rocky (mix heavy metals/silicate), mantles are slushy mixes of water, methane, ammonia, ices and atmos start off near liquid planet as mostly methane, ammonia and water vapour. Little h and he as opposed to other cause of lower escape velocity (too small to retain great qualities)
