Obs. : 2025-12-05
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.313e+08
Venus      8.612e+08
Earth      8.829e+08
Mars       8.727e+08
Jupiter    8.553e+08
Saturn     8.754e+08
Uranus     8.920e+08
Neptune    8.754e+08
Pluto      8.574e+08