Obs. : 2017-01-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    2.505e+11
Venus      2.596e+11
Earth      2.646e+11
Mars       2.596e+11
Jupiter    2.571e+11
Saturn     2.502e+11
Uranus     2.609e+11
Neptune    2.579e+11
Pluto      2.520e+11