Obs. : 2017-05-25
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.469e+11
Venus      3.530e+11
Earth      3.440e+11
Mars       3.389e+11
Jupiter    3.386e+11
Saturn     3.477e+11
Uranus     3.520e+11
Neptune    3.516e+11
Pluto      3.532e+11