Obs. : 2018-01-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.521e+11
Venus      3.545e+11
Earth      3.483e+11
Mars       3.498e+11
Jupiter    3.498e+11
Saturn     3.521e+11
Uranus     3.461e+11
Neptune    3.525e+11
Pluto      3.547e+11