Obs. : 2017-07-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.537e+11
Venus      3.701e+11
Earth      3.636e+11
Mars       3.540e+11
Jupiter    3.689e+11
Saturn     3.637e+11
Uranus     3.692e+11
Neptune    3.599e+11
Pluto      3.619e+11