Obs. : 2025-10-19
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.943e+08
Venus      7.600e+08
Earth      8.349e+08
Mars       7.943e+08
Jupiter    8.143e+08
Saturn     8.383e+08
Uranus     8.184e+08
Neptune    8.349e+08
Pluto      8.678e+08