Obs. : 2017-09-05
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.953e+11
Venus      3.950e+11
Earth      4.185e+11
Mars       3.986e+11
Jupiter    4.059e+11
Saturn     4.221e+11
Uranus     4.126e+11
Neptune    4.273e+11
Pluto      4.288e+11