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Earth and Space > Solar System Data

Note that Pluto is no longer classed as a planet. Scientists agreed that for a celestial body to qualify as a planet:
  • it must be in orbit around the Sun
  • it must be large enough that it takes on a nearly round shape
  • it has cleared its orbit of other objects
Pluto was automatically disqualified because its highly elliptical orbit overlaps with Neptune. It will now join a new category of dwarf planets.

  Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune
Distance from sun (million miles) 36 67.2 93 141.6 483.6 886.7 1,784 2,794.4
Orbit (years) 0.24 0.62 1 1.88 11.86 29.46 84.01 164.79
Orbital velocity (km/s) 47.89 35.04 29.79 24.14 13.06 9.64 6.81 5.43
Radius (equator) 2439 6052 6378 3397 71490 60268 25559 25269
Radius (polar) 2439 6052 6357 3380 66854 54360 24973 24340
Mean density
(g/cm³)
5.43 5.25 5.52 3.95 1.33 0.69 1.29 1.64
Mass (earth=1) 0.06 0.82 1 0.11 317.89 95.18 14.53 17.14
Body rotation (hours) 1408 5832 23.93 24.62 9.92 10.66 17.24 16.11
Equator to orbit tilt (degrees) 2 177.3 23.45 25.19 3.12 26.73 97.86 29.6
satellites 0 0 1 2 >28 30 24 8