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• ! 7 millibars (0.007 atmospheres)
95.3% CO2, 2.7% N2, 1.6% Ar
Ar Surface features
• ! 1.52 AU
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
! 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:
Density: ! All atmosphere !
! • •
! 5.20 AU
1.33 g/cc Unclear if there is a solid core
• Liquid metallic hydrogen?
• Total rocky material = 10-15 Earth masses
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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This document was uploaded on 04/05/2014.
- Spring '14