Obs. : 2018-12-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.440e+11
Venus      3.435e+11
Earth      3.504e+11
Mars       3.535e+11
Jupiter    3.485e+11
Saturn     3.558e+11
Uranus     3.480e+11
Neptune    3.515e+11
Pluto      3.570e+11