Obs. : 2025-07-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.189e+08
Venus      8.346e+08
Earth      8.331e+08
Mars       8.245e+08
Jupiter    8.210e+08
Saturn     8.618e+08
Uranus     8.520e+08
Neptune    8.618e+08
Pluto      8.309e+08