Obs. : 2009-09-08
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.455e+11
Venus      3.338e+11
Earth      3.465e+11
Mars       3.409e+11
Jupiter    3.465e+11
Saturn     3.371e+11
Uranus     3.420e+11
Neptune    3.465e+11
Pluto      3.527e+11