Obs. : 2008-09-27
Planet	Ly alpha (photons/cm^2/sec)
Mercury    3.490e+11
Venus      3.490e+11
Earth      3.430e+11
Mars       3.490e+11
Jupiter    3.507e+11
Saturn     3.370e+11
Uranus     3.430e+11
Neptune    3.433e+11
Pluto      3.530e+11