Obs. : 2013-04-17
Planet	Ly alpha (photons/cm^2/sec)
Mercury    4.730e+11
Venus      4.566e+11
Earth      3.994e+11
Mars       4.636e+11
Jupiter    4.230e+11
Saturn     3.939e+11
Uranus     4.730e+11
Neptune    4.764e+11
Pluto      4.172e+11