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Sun and inner planets

This page contains data for the Sun and Inner planets.
For the whole solar system see: Planetary data
For the outer planets see: Outer planets
For general astronomical data see: Astronomical data


Mean radius   1.99x108m
Mass   1.9x1027 kg
Core temperature   1.5x106 K
Surface temperature   6000 K
Surface gravity   274 ms-2
Day length   24.5 days (equatorial)


Mean radius   2.44x106m
Mass   3.58x1023 kg
Distance from Sun   1.43x1012m = 79 light mins = 9.5 AU
Surface gravity   10.4 ms-2
Day length   10.23 hours
Year length   29.5 Earth years


Mean radius   6.052x106m
Mass   4.90x1024 kg
Distance from Sun   1.08x1011m = 6 light mins = 0.72 AU
Surface gravity   8.84 ms-2
Day length   243 days (R)
Year length   225 days


Mean radius   6.38x106m
Mass   5.98x1024 kg
Distance from Sun   1.496x1011m = 8.3 light mins = 1.0 AU
Surface gravity   9.81 ms-2
Day length   23.9 hours
Year length   365.26 days

Moon (Earth's)

Mean radius   1.74x106m
Mass   7.35x1022 kg
Distance from Earth   3.8x108m = 1.25 light seconds
Surface gravity   1.62 ms-2
Day length   27.32 Earth days (R)
Orbital period   27.32 Earth days


Mean radius   3.39x106m
Mass   6.4x1023 kg
Distance from Sun   2.3x1011m = 12 light mins = 1.52 AU
Surface gravity   3.80 ms-2
Day length   24.6 hours (R)
Year length   687 days
© Keith Gibbs 2013