Obs. : 2017-08-01
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.514e+11
Venus      3.455e+11
Earth      3.608e+11
Mars       3.410e+11
Jupiter    3.771e+11
Saturn     3.683e+11
Uranus     3.444e+11
Neptune    3.475e+11
Pluto      3.608e+11