Obs. : 2025-08-17
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.301e+08
Venus      8.373e+08
Earth      7.783e+08
Mars       7.974e+08
Jupiter    8.373e+08
Saturn     7.907e+08
Uranus     8.246e+08
Neptune    7.907e+08
Pluto      7.748e+08