Obs. : 2008-04-16 Planet Ly alpha Mercury 3.863e+11 Venus 3.751e+11 Earth 3.637e+11 Mars 3.803e+11 Jupiter 3.428e+11 Saturn 3.712e+11 Uranus 3.560e+11 Neptune 3.455e+11 Pluto 3.463e+11