Obs. : 2025-07-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.270e+08
Venus      8.454e+08
Earth      8.426e+08
Mars       8.284e+08
Jupiter    8.381e+08
Saturn     8.539e+08
Uranus     8.508e+08
Neptune    8.539e+08
Pluto      8.473e+08