Obs. : 2017-05-05
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.864e+11
Venus      3.805e+11
Earth      3.669e+11
Mars       3.930e+11
Jupiter    3.629e+11
Saturn     3.674e+11
Uranus     3.864e+11
Neptune    3.719e+11
Pluto      3.698e+11