Obs. : 2025-04-23
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.740e+08
Venus      8.704e+08
Earth      9.297e+08
Mars       8.856e+08
Jupiter    8.724e+08
Saturn     8.704e+08
Uranus     8.734e+08
Neptune    8.704e+08
Pluto      8.608e+08