Obs. : 2026-07-27
Planet	Ly alpha (photons/cm^2/sec)
Mercury    7.589e+08
Venus      8.414e+08
Earth      8.677e+08
Mars       7.572e+08
Jupiter    7.901e+08
Saturn     8.497e+08
Uranus     7.752e+08
Neptune    8.346e+08
Pluto      9.374e+08