Obs. : 2017-06-01
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.725e+11
Venus      3.689e+11
Earth      3.671e+11
Mars       3.767e+11
Jupiter    3.747e+11
Saturn     3.626e+11
Uranus     3.689e+11
Neptune    3.618e+11
Pluto      3.611e+11