Obs. : 2017-06-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.332e+11
Venus      3.303e+11
Earth      3.362e+11
Mars       3.407e+11
Jupiter    3.432e+11
Saturn     3.341e+11
Uranus     3.303e+11
Neptune    3.263e+11
Pluto      3.327e+11