Obs. : 2017-07-20
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.552e+11
Venus      3.725e+11
Earth      3.610e+11
Mars       3.594e+11
Jupiter    3.658e+11
Saturn     3.624e+11
Uranus     3.631e+11
Neptune    3.570e+11
Pluto      3.600e+11