Obs. : 2012-02-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    4.143e+11
Venus      4.240e+11
Earth      4.244e+11
Mars       4.219e+11
Jupiter    4.246e+11
Saturn     4.128e+11
Uranus     4.193e+11
Neptune    4.097e+11
Pluto      4.066e+11