Obs. : 2025-07-13
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.013e+08
Venus      8.013e+08
Earth      8.004e+08
Mars       8.010e+08
Jupiter    8.013e+08
Saturn     8.101e+08
Uranus     8.029e+08
Neptune    8.101e+08
Pluto      7.987e+08