Obs. : 2017-04-12
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.845e+11
Venus      3.952e+11
Earth      3.715e+11
Mars       3.650e+11
Jupiter    3.653e+11
Saturn     3.786e+11
Uranus     3.845e+11
Neptune    3.914e+11
Pluto      3.821e+11