Obs. : 2009-04-23
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.574e+11
Venus      3.459e+11
Earth      3.450e+11
Mars       3.459e+11
Jupiter    3.373e+11
Saturn     3.521e+11
Uranus     3.459e+11
Neptune    3.373e+11
Pluto      3.375e+11