Obs. : 2025-07-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.331e+08
Venus      8.506e+08
Earth      8.363e+08
Mars       8.375e+08
Jupiter    8.383e+08
Saturn     8.565e+08
Uranus     8.633e+08
Neptune    8.565e+08
Pluto      8.398e+08