Obs. : 2022-03-05 Planet Ly alpha (photons/cm^2/sec) Mercury 7.285e+08 Venus 7.315e+08 Earth 7.788e+08 Mars 7.315e+08 Jupiter 7.259e+08 Saturn 7.285e+08 Uranus 7.045e+08 Neptune 7.175e+08 Pluto 7.315e+08