Obs. : 2008-04-18 Planet Ly alpha Mercury 3.767e+11 Venus 3.639e+11 Earth 3.685e+11 Mars 3.821e+11 Jupiter 3.467e+11 Saturn 3.756e+11 Uranus 3.558e+11 Neptune 3.477e+11 Pluto 3.509e+11