Obs. : 2017-03-17
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.650e+11
Venus      3.650e+11
Earth      3.635e+11
Mars       3.560e+11
Jupiter    3.635e+11
Saturn     3.682e+11
Uranus     3.599e+11
Neptune    3.724e+11
Pluto      3.688e+11