Even though you've got your answer, I thought I'd throw my two cents in:
It depends on the aperture and focal length of his telescopic vision...
It depends too on whether or not the milky way is visible in the night sky. Clark could probably resolve individual stars where a normal person can only see the 'milkiness' caused by the accumulation of the light from 100 billion stars.
Although, in the Northern hemisphere, when the milky way is overhead, you're looking out of the galaxy rather than towards the center (you need to be in the Southern hemisphere to see that properly).
Catherine - off to do a planetarium show, believe it or not.
