Obs. : 2017-09-08
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.479e+11
Venus      3.479e+11
Earth      3.431e+11
Mars       3.512e+11
Jupiter    3.628e+11
Saturn     3.676e+11
Uranus     3.429e+11
Neptune    3.569e+11
Pluto      3.697e+11