Obs. : 2014-11-11 Planet Ly alpha (photons/cm^2/sec) Mercury 4.050e+11 Venus 4.032e+11 Earth 4.205e+11 Mars 4.001e+11 Jupiter 4.394e+11 Saturn 4.032e+11 Uranus 4.011e+11 Neptune 4.012e+11 Pluto 4.001e+11