Obs. : 2008-09-23 Planet Ly alpha Mercury 2.563e+11 Venus 2.563e+11 Earth 2.597e+11 Mars 2.563e+11 Jupiter 2.638e+11 Saturn 2.464e+11 Uranus 2.596e+11 Neptune 2.604e+11 Pluto 2.641e+11