Obs. : 2018-07-25
Planet	Ly alpha (photons/cm^2/sec)
Mercury    4.094e+11
Venus      4.099e+11
Earth      4.063e+11
Mars       4.031e+11
Jupiter    4.128e+11
Saturn     4.063e+11
Uranus     4.017e+11
Neptune    3.968e+11
Pluto      4.055e+11