Obs. : 2012-04-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    4.242e+11
Venus      4.309e+11
Earth      4.546e+11
Mars       4.571e+11
Jupiter    4.279e+11
Saturn     4.546e+11
Uranus     4.242e+11
Neptune    4.325e+11
Pluto      4.352e+11