Obs. : 2014-11-05 Planet Ly alpha (photons/cm^2/sec) Mercury 4.496e+11 Venus 4.402e+11 Earth 4.153e+11 Mars 4.203e+11 Jupiter 4.439e+11 Saturn 4.402e+11 Uranus 4.182e+11 Neptune 4.222e+11 Pluto 4.203e+11