Obs. : 2008-05-25 Planet Ly alpha Mercury 3.835e+11 Venus 3.767e+11 Earth 3.785e+11 Mars 3.774e+11 Jupiter 3.681e+11 Saturn 3.792e+11 Uranus 3.771e+11 Neptune 3.719e+11 Pluto 3.737e+11