Obs. : 2017-07-03
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.604e+11
Venus      3.601e+11
Earth      3.554e+11
Mars       3.604e+11
Jupiter    3.675e+11
Saturn     3.554e+11
Uranus     3.576e+11
Neptune    3.516e+11
Pluto      3.512e+11