Obs. : 2017-02-11
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.500e+11
Venus      3.733e+11
Earth      3.595e+11
Mars       3.714e+11
Jupiter    3.485e+11
Saturn     3.397e+11
Uranus     3.714e+11
Neptune    3.757e+11
Pluto      3.431e+11