Obs. : 2009-07-29
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.437e+11
Venus      3.388e+11
Earth      3.520e+11
Mars       3.453e+11
Jupiter    3.520e+11
Saturn     3.497e+11
Uranus     3.454e+11
Neptune    3.491e+11
Pluto      3.529e+11