Obs. : 2025-07-24
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.023e+08
Venus      8.005e+08
Earth      8.593e+08
Mars       8.191e+08
Jupiter    7.946e+08
Saturn     8.712e+08
Uranus     8.406e+08
Neptune    8.712e+08
Pluto      8.575e+08