Obs. : 2017-04-07
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.953e+11
Venus      3.947e+11
Earth      3.660e+11
Mars       3.920e+11
Jupiter    3.596e+11
Saturn     3.718e+11
Uranus     3.994e+11
Neptune    3.898e+11
Pluto      3.751e+11