Obs. : 2009-04-08
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.684e+11
Venus      3.637e+11
Earth      3.536e+11
Mars       3.553e+11
Jupiter    3.491e+11
Saturn     3.540e+11
Uranus     3.637e+11
Neptune    3.491e+11
Pluto      3.445e+11