Obs. : 2009-09-17
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.468e+11
Venus      3.361e+11
Earth      3.470e+11
Mars       3.378e+11
Jupiter    3.504e+11
Saturn     3.390e+11
Uranus     3.464e+11
Neptune    3.504e+11
Pluto      3.609e+11