Obs. : 2017-04-13
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.784e+11
Venus      3.880e+11
Earth      3.710e+11
Mars       3.584e+11
Jupiter    3.643e+11
Saturn     3.805e+11
Uranus     3.784e+11
Neptune    3.856e+11
Pluto      3.810e+11