Obs. : 2025-04-27
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.647e+08
Venus      8.669e+08
Earth      9.036e+08
Mars       8.527e+08
Jupiter    8.611e+08
Saturn     8.669e+08
Uranus     8.626e+08
Neptune    8.669e+08
Pluto      8.855e+08