Obs. : 2025-07-29
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.545e+08
Venus      8.068e+08
Earth      8.692e+08
Mars       8.679e+08
Jupiter    8.155e+08
Saturn     8.535e+08
Uranus     8.162e+08
Neptune    8.535e+08
Pluto      8.862e+08