Obs. : 2025-12-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.536e+08
Venus      8.422e+08
Earth      8.010e+08
Mars       8.141e+08
Jupiter    8.010e+08
Saturn     7.314e+08
Uranus     7.859e+08
Neptune    7.314e+08
Pluto      7.782e+08