Region Planet Dwarf Planer Asteroids Moon atmosphere
(bar)
Element Magnetic Dense
Mercury X 10-14 H2 strong 5.427g/cm3
second highest in solar system
Venus 100 CO2 weak
Earth - - - 1 N2
Moon
Mars 0.01-0.001 CO2
Asteroid Belt Ceres <<
Jupiter - - - >> H2
Io
Jupiter I
10-9 SO2
Europa
Jupiter II
10-12 O2
Ganymede
Jupiter III
10-12 O2 substantial magnetic field
Callisto
Jupiter IV
10-12 CO2
Saturn - - - >> H2
Enceladus
Saturn II
<<
Titan
Saturn VI
1
Uranus >>
Neptune - - - >> H2
Triton
Neptune I
TNO
(KBO) Pluto - - 10-5 NO2
(Oort Cloud) Charon
Pluto I
(Hills’ Cloud) Makemake X
(Scattered Disk) Arrokoth ?