Obs. : 2025-08-23
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.056e+08
Venus      8.281e+08
Earth      8.202e+08
Mars       7.957e+08
Jupiter    8.508e+08
Saturn     8.405e+08
Uranus     8.900e+08
Neptune    8.673e+08
Pluto      7.825e+08