Obs. : 2018-09-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.379e+11
Venus      3.380e+11
Earth      3.401e+11
Mars       3.400e+11
Jupiter    3.387e+11
Saturn     3.362e+11
Uranus     3.421e+11
Neptune    3.389e+11
Pluto      3.410e+11