Obs. : 2008-09-22
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.455e+11
Venus      3.455e+11
Earth      3.483e+11
Mars       3.455e+11
Jupiter    3.542e+11
Saturn     3.307e+11
Uranus     3.458e+11
Neptune    3.489e+11
Pluto      3.552e+11