Obs. : 2017-08-15
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.488e+11
Venus      3.642e+11
Earth      3.585e+11
Mars       3.515e+11
Jupiter    3.660e+11
Saturn     3.625e+11
Uranus     3.560e+11
Neptune    3.547e+11
Pluto      3.568e+11