Obs. : 2017-12-27
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.632e+11
Venus      3.640e+11
Earth      3.572e+11
Mars       3.626e+11
Jupiter    3.626e+11
Saturn     3.640e+11
Uranus     3.505e+11
Neptune    3.557e+11
Pluto      3.660e+11