Obs. : 2025-08-24
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.904e+08
Venus      8.229e+08
Earth      8.553e+08
Mars       7.830e+08
Jupiter    8.521e+08
Saturn     8.762e+08
Uranus     9.041e+08
Neptune    8.762e+08
Pluto      7.880e+08