Obs. : 2026-07-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.404e+08
Venus      8.760e+08
Earth      7.419e+08
Mars       7.863e+08
Jupiter    8.528e+08
Saturn     7.531e+08
Uranus     7.863e+08
Neptune    7.495e+08
Pluto      7.419e+08