Obs. : 2017-09-06
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.607e+11
Venus      3.602e+11
Earth      3.731e+11
Mars       3.646e+11
Jupiter    3.761e+11
Saturn     3.945e+11
Uranus     3.680e+11
Neptune    3.910e+11
Pluto      4.018e+11