Obs. : 2007-12-19 Planet Ly alpha Mercury 6.389e+11 Venus 6.241e+11 Earth 6.130e+11 Mars 6.139e+11 Jupiter 6.389e+11 Saturn 6.159e+11 Uranus 6.176e+11 Neptune 6.271e+11 Pluto 6.331e+11