Obs. : 2018-05-19
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.639e+11
Venus      3.509e+11
Earth      3.509e+11
Mars       3.516e+11
Jupiter    3.509e+11
Saturn     3.519e+11
Uranus     3.639e+11
Neptune    3.544e+11
Pluto      3.502e+11