Obs. : 2018-04-21
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.635e+11
Venus      3.642e+11
Earth      3.600e+11
Mars       3.620e+11
Jupiter    3.605e+11
Saturn     3.633e+11
Uranus     3.658e+11
Neptune    3.630e+11
Pluto      3.620e+11