Obs. : 2025-12-23
Planet	Ly alpha (photons/cm^2/sec)
Mercury    8.455e+08
Venus      8.219e+08
Earth      8.246e+08
Mars       7.942e+08
Jupiter    8.246e+08
Saturn     7.289e+08
Uranus     7.965e+08
Neptune    7.289e+08
Pluto      7.460e+08