Obs. : 2019-07-16
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.446e+11
Venus      3.430e+11
Earth      3.470e+11
Mars       3.503e+11
Jupiter    3.497e+11
Saturn     3.461e+11
Uranus     3.358e+11
Neptune    3.375e+11
Pluto      3.461e+11