Obs. : 2009-12-31
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.817e+11
Venus      3.750e+11
Earth      3.568e+11
Mars       3.560e+11
Jupiter    3.756e+11
Saturn     3.522e+11
Uranus     3.698e+11
Neptune    3.807e+11
Pluto      3.750e+11