Obs. : 2018-09-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.912e+11
Venus      3.918e+11
Earth      3.942e+11
Mars       3.968e+11
Jupiter    3.955e+11
Saturn     3.957e+11
Uranus     3.964e+11
Neptune    3.929e+11
Pluto      3.960e+11