Obs. : 2025-12-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.387e+08
Venus      8.291e+08
Earth      7.509e+08
Mars       8.117e+08
Jupiter    7.509e+08
Saturn     7.339e+08
Uranus     7.435e+08
Neptune    7.240e+08
Pluto      7.816e+08