Obs. : 2010-05-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.799e+11
Venus      3.828e+11
Earth      3.693e+11
Mars       3.894e+11
Jupiter    3.670e+11
Saturn     3.871e+11
Uranus     3.670e+11
Neptune    3.589e+11
Pluto      3.668e+11