Obs. : 2017-11-30
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.766e+11
Venus      3.784e+11
Earth      3.596e+11
Mars       3.764e+11
Jupiter    3.777e+11
Saturn     3.766e+11
Uranus     3.581e+11
Neptune    3.637e+11
Pluto      3.712e+11