Obs. : 2018-01-04
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.590e+11
Venus      3.664e+11
Earth      3.574e+11
Mars       3.487e+11
Jupiter    3.487e+11
Saturn     3.664e+11
Uranus     3.592e+11
Neptune    3.701e+11
Pluto      3.723e+11