Obs. : 2017-07-25
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.699e+11
Venus      3.586e+11
Earth      3.606e+11
Mars       3.687e+11
Jupiter    3.674e+11
Saturn     3.594e+11
Uranus     3.500e+11
Neptune    3.502e+11
Pluto      3.606e+11