Obs. : 2014-08-30 Planet Ly alpha (photons/cm^2/sec) Mercury 4.035e+11 Venus 4.046e+11 Earth 4.081e+11 Mars 4.023e+11 Jupiter 4.035e+11 Saturn 4.023e+11 Uranus 4.078e+11 Neptune 4.084e+11 Pluto 4.012e+11