Obs. : 2017-04-05
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.984e+11
Venus      3.909e+11
Earth      3.694e+11
Mars       3.978e+11
Jupiter    3.693e+11
Saturn     3.751e+11
Uranus     3.950e+11
Neptune    3.880e+11
Pluto      3.765e+11