Obs. : 2018-09-17
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.374e+11
Venus      3.404e+11
Earth      3.407e+11
Mars       3.427e+11
Jupiter    3.411e+11
Saturn     3.412e+11
Uranus     3.424e+11
Neptune    3.414e+11
Pluto      3.428e+11