Obs. : 2008-04-19 Planet Ly alpha Mercury 3.714e+11 Venus 3.598e+11 Earth 3.727e+11 Mars 3.861e+11 Jupiter 3.492e+11 Saturn 3.811e+11 Uranus 3.533e+11 Neptune 3.446e+11 Pluto 3.560e+11