Obs. : 2009-11-12
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.744e+11
Venus      3.531e+11
Earth      3.522e+11
Mars       3.470e+11
Jupiter    3.679e+11
Saturn     3.418e+11
Uranus     3.598e+11
Neptune    3.648e+11
Pluto      3.755e+11