Obs. : 2019-07-18
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.459e+11
Venus      3.433e+11
Earth      3.450e+11
Mars       3.459e+11
Jupiter    3.500e+11
Saturn     3.450e+11
Uranus     3.345e+11
Neptune    3.340e+11
Pluto      3.450e+11