Obs. : 2025-07-30
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.635e+08
Venus      8.214e+08
Earth      8.651e+08
Mars       8.783e+08
Jupiter    8.291e+08
Saturn     8.543e+08
Uranus     8.253e+08
Neptune    8.543e+08
Pluto      8.852e+08