Obs. : 2025-08-10
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.606e+08
Venus      8.581e+08
Earth      8.182e+08
Mars       8.901e+08
Jupiter    8.581e+08
Saturn     8.221e+08
Uranus     8.430e+08
Neptune    8.221e+08
Pluto      8.320e+08