Obs. : 2025-10-10
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.607e+08
Venus      8.467e+08
Earth      7.690e+08
Mars       8.607e+08
Jupiter    8.096e+08
Saturn     7.690e+08
Uranus     7.878e+08
Neptune    7.690e+08
Pluto      8.315e+08