Obs. : 2013-05-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    4.572e+11
Venus      4.572e+11
Earth      4.404e+11
Mars       4.565e+11
Jupiter    4.557e+11
Saturn     4.422e+11
Uranus     4.581e+11
Neptune    4.578e+11
Pluto      4.444e+11