Obs. : 2009-10-22
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.391e+11
Venus      3.400e+11
Earth      3.581e+11
Mars       3.522e+11
Jupiter    3.598e+11
Saturn     3.413e+11
Uranus     3.573e+11
Neptune    3.598e+11
Pluto      3.590e+11