Obs. : 2017-01-31
Planet	Ly alpha (photons/cm^2/sec)
Mercury    2.023e+11
Venus      1.947e+11
Earth      1.896e+11
Mars       1.947e+11
Jupiter    1.933e+11
Saturn     1.972e+11
Uranus     1.916e+11
Neptune    1.997e+11
Pluto      2.023e+11