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Astronomical data

This page contains general astronomical data.
For the outer planets see: Outer planets
For the Sun and inner planets see: Sun and inner planets
For the whole Solar System see: Planetary data
For galaxies catalogue see: Galaxies catalogue

Astronomical unit (AU) 1.496x1011 m = 8.31 light minutes
Light year 9.461x1015m = 63240 AU = 0.3067 parsecs
Parsec (pc) 3.06x1016 m = 3.261 light years
Megaparsec (Mpc) 3.06x1022m = 3.261x106 light years
Hubble constant (H) 72 kms-1Mpc-1
© Keith Gibbs 2011