Obs. : 2017-04-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.617e+11
Venus      3.634e+11
Earth      3.903e+11
Mars       3.628e+11
Jupiter    3.774e+11
Saturn     3.873e+11
Uranus     3.617e+11
Neptune    3.641e+11
Pluto      3.766e+11