| MadSci Network: Astronomy |
After a fair bit of searching on the Web, I was able to find the
information you're looking for. This figure, from The
University of Michigan Virtual Museum, summarizes the path of the
Earth's axis projected onto the celestial sphere (i.e., the path of the
North Celestial Pole).
A good description about why this happens (along with another good figure) can be found at San Francisco State University.
Finally, there are some computer programs which will show you where the pole is in the sky at any date. SkyMap is a very good program for MS-Windows -- I highly recommend it. YourSky is also good, and has the advantage that it's a Web interface, so you can use it with almost any computer. It is, however, hard to use. Here's a YourSky plot of the sky in 2800 BC, when Thuban (alpha Draconis) was, in fact, the pole star:
Try the links in the MadSci Library for more information on Astronomy.