Obs. : 2025-07-25
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.173e+08
Venus      8.052e+08
Earth      8.693e+08
Mars       8.256e+08
Jupiter    8.028e+08
Saturn     8.772e+08
Uranus     8.406e+08
Neptune    8.772e+08
Pluto      8.528e+08