Obs. : 2018-07-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    4.012e+11
Venus      4.066e+11
Earth      3.896e+11
Mars       3.817e+11
Jupiter    3.954e+11
Saturn     3.869e+11
Uranus     3.783e+11
Neptune    3.769e+11
Pluto      3.833e+11