Obs. : 2025-07-31
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.388e+08
Venus      8.188e+08
Earth      8.410e+08
Mars       8.699e+08
Jupiter    8.272e+08
Saturn     8.289e+08
Uranus     8.190e+08
Neptune    8.289e+08
Pluto      8.680e+08