Obs. : 2008-12-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.548e+11
Venus      3.587e+11
Earth      3.478e+11
Mars       3.482e+11
Jupiter    3.586e+11
Saturn     3.388e+11
Uranus     3.531e+11
Neptune    3.587e+11
Pluto      3.482e+11