Obs. : 2014-08-24 Planet Ly alpha (photons/cm^2/sec) Mercury 4.048e+11 Venus 3.842e+11 Earth 4.182e+11 Mars 4.391e+11 Jupiter 3.842e+11 Saturn 4.391e+11 Uranus 3.995e+11 Neptune 4.098e+11 Pluto 4.276e+11