Obs. : 2008-04-12 Planet Ly alpha Mercury 3.881e+11 Venus 3.737e+11 Earth 3.557e+11 Mars 3.679e+11 Jupiter 3.433e+11 Saturn 3.598e+11 Uranus 3.591e+11 Neptune 3.530e+11 Pluto 3.456e+11