Obs. : 2018-12-24
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.464e+11
Venus      3.425e+11
Earth      3.510e+11
Mars       3.586e+11
Jupiter    3.464e+11
Saturn     3.595e+11
Uranus     3.516e+11
Neptune    3.603e+11
Pluto      3.606e+11