Obs. : 2025-06-23
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.006e+08
Venus      7.977e+08
Earth      7.867e+08
Mars       7.951e+08
Jupiter    8.005e+08
Saturn     7.974e+08
Uranus     7.977e+08
Neptune    7.974e+08
Pluto      7.896e+08