Obs. : 2017-09-02
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.772e+11
Venus      3.774e+11
Earth      4.020e+11
Mars       3.772e+11
Jupiter    3.765e+11
Saturn     3.843e+11
Uranus     4.030e+11
Neptune    4.050e+11
Pluto      3.871e+11