Obs. : 2008-10-24
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.480e+11
Venus      3.627e+11
Earth      3.490e+11
Mars       3.574e+11
Jupiter    3.614e+11
Saturn     3.475e+11
Uranus     3.475e+11
Neptune    3.525e+11
Pluto      3.632e+11