Obs. : 2009-10-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.401e+11
Venus      3.388e+11
Earth      3.553e+11
Mars       3.480e+11
Jupiter    3.597e+11
Saturn     3.388e+11
Uranus     3.557e+11
Neptune    3.597e+11
Pluto      3.639e+11