Obs. : 2016-03-22 Planet Ly alpha (photons/cm^2/sec) Mercury 4.281e+11 Venus 4.289e+11 Earth 4.170e+11 Mars 4.248e+11 Jupiter 4.136e+11 Saturn 4.248e+11 Uranus 4.225e+11 Neptune 4.289e+11 Pluto 4.255e+11