Via Charles Stross’ LJ, I found this Astronomy knowledge quiz. Since the link was posted, the quiz writer modified the results so it gives you the ratio of correct answers in each category rather than the precentage. So I got 5 of 5 background knowledge, 6 of 8 solar system, 6 of 6 stars, and 5 of 5 galaxies.
More interesting to me than the results is tracking down where I got my knowledge from. Come back here after looking at the quiz..