Obs. : 2007-12-31 Planet Ly alpha Mercury 3.095e+11 Venus 2.934e+11 Earth 3.016e+11 Mars 3.035e+11 Jupiter 3.010e+11 Saturn 2.979e+11 Uranus 3.228e+11 Neptune 3.243e+11 Pluto 3.010e+11