temps 20000 c nasa rock cores 5 composition is

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Unformatted text preview: interiors ‣ High pressures ‣ Liquid metal at very high pressures ‣ “Rocky” “ices”, metal etc.. ‣ Temps > 20,000º C! NASA ‣ Rock, cores 5 Composition is mainly hydrogen and helium. Below the roughly 1000-kilometer-thick atmosphere, a layer of liquid hydrogen extends to a depth of 20,000 kilometers. Even deeper, it is believed that there is a layer of liquid metallic hydrogen at a pressure of 3 million atmospheres. The planet core of 10 MEarth is believed to be comprised of iron-nickel alloy, rock, & “ices” at a temperature estimated to exceed 20,000C. Uranus & Neptune: Ice Giants ‣ Atmosphere: H, He, and traces of methane ‣ Methane absorbs red light, giving planets their bluish colors ‣ Mantles: water, ammonia, and methane “ices” (2,500 5,000º C) and high pressure ‣ Cores: rock and ices NASA ‣ Superheated 6 H/He atmospheres No metallic hydrogen layer Mantle is an “ocean” of compressed water, ammonia, & methane - superheated, but under high pressure What is the weather like on jovian planets? ‣ Clouds are divided into bands ‣ Lightly-colored zones ‣ Relatively dark belts east-west, parallel to the equator ‣ Bounded by wind flows called jets to planets’ rapid rotational speeds Wikimedia Commons ...
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This note was uploaded on 10/23/2013 for the course ASTR 100 taught by Professor Dunne during the Fall '12 term at University of Illinois, Urbana Champaign.

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