Obs. : 2022-03-11 Planet Ly alpha (photons/cm^2/sec) Mercury 7.461e+08 Venus 7.344e+08 Earth 7.545e+08 Mars 7.344e+08 Jupiter 7.512e+08 Saturn 7.401e+08 Uranus 7.779e+08 Neptune 7.500e+08 Pluto 7.344e+08