Obs. : 2009-08-24
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.431e+11
Venus      3.415e+11
Earth      3.457e+11
Mars       3.421e+11
Jupiter    3.457e+11
Saturn     3.431e+11
Uranus     3.440e+11
Neptune    3.457e+11
Pluto      3.504e+11