Obs. : 2014-07-06 Planet Ly alpha (photons/cm^2/sec) Mercury 3.799e+11 Venus 3.799e+11 Earth 4.769e+11 Mars 4.054e+11 Jupiter 3.563e+11 Saturn 4.281e+11 Uranus 4.280e+11 Neptune 4.642e+11 Pluto 4.769e+11