Obs. : 2016-03-24 Planet Ly alpha (photons/cm^2/sec) Mercury 4.171e+11 Venus 4.249e+11 Earth 4.181e+11 Mars 4.241e+11 Jupiter 4.077e+11 Saturn 4.241e+11 Uranus 4.171e+11 Neptune 4.249e+11 Pluto 4.242e+11