152 au 6794 km 394 gcc too small to retain interior

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Unformatted text preview: ad • • ! 7 millibars (0.007 atmospheres) 95.3% CO2, 2.7% N2, 1.6% Ar Ar Surface features • • ! 1.52 AU 6,794 km 3.94 g/cc Too small to retain interior heat to the present day Small Fe-Ni core, solid today Moons • Two small moons (Phobos, Deimos), captured asteroids, most likely Terrestrial Planets: Mars Mars ! Evidence of liquid water on Mars today • • Intermittent outflows of water, likely resulting from pressure release of liquid from confined groundwater bodies Found by NASA’s Mars Global Surveyor Jovian Planets: Jupiter ! Orbit: Diameter: Density: ! All atmosphere ! ! • • • • ! 5.20 AU 142,984 km 1.33 g/cc Unclear if there is a solid core • Liquid metallic hydrogen? • Total rocky material = 10-15 Earth masses 90% H2 10% He Solar abundances of the other elements Jovian satellites • • Jupiter has a diverse suite of large satellites, as well as dozens of tiny moonlets and captured asteroids Larger Jovian satellites (Io, Europa, Ganymede, Callisto) have rocky mantles and cores, with surfaces of volatiles (sulfur, water ice)...
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