Obs. : 2025-12-25
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.109e+08
Venus      8.109e+08
Earth      8.601e+08
Mars       7.884e+08
Jupiter    8.601e+08
Saturn     7.553e+08
Uranus     8.454e+08
Neptune    7.553e+08
Pluto      7.731e+08