Obs. : 2017-12-13
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.468e+11
Venus      3.468e+11
Earth      3.542e+11
Mars       3.283e+11
Jupiter    3.317e+11
Saturn     3.543e+11
Uranus     3.568e+11
Neptune    3.650e+11
Pluto      3.592e+11