Obs. : 2025-12-07
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.706e+08
Venus      8.922e+08
Earth      8.830e+08
Mars       9.050e+08
Jupiter    8.390e+08
Saturn     9.262e+08
Uranus     9.154e+08
Neptune    9.262e+08
Pluto      8.964e+08