Obs. : 2022-02-26 Planet Ly alpha (photons/cm^2/sec) Mercury 7.269e+08 Venus 7.497e+08 Earth 7.334e+08 Mars 7.377e+08 Jupiter 7.049e+08 Saturn 7.269e+08 Uranus 6.826e+08 Neptune 7.049e+08 Pluto 7.377e+08