Obs. : 2018-10-07
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.445e+11
Venus      3.431e+11
Earth      3.560e+11
Mars       3.512e+11
Jupiter    3.473e+11
Saturn     3.504e+11
Uranus     3.560e+11
Neptune    3.519e+11
Pluto      3.507e+11