Obs. : 2025-08-22
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.066e+08
Venus      8.252e+08
Earth      8.039e+08
Mars       7.794e+08
Jupiter    8.252e+08
Saturn     8.365e+08
Uranus     8.566e+08
Neptune    8.365e+08
Pluto      7.713e+08