Obs. : 2025-11-07
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.164e+08
Venus      8.091e+08
Earth      8.533e+08
Mars       8.164e+08
Jupiter    8.164e+08
Saturn     8.508e+08
Uranus     8.521e+08
Neptune    8.508e+08
Pluto      8.406e+08