Brought to our attention by Synoptical simpatica MCL, this gorgeously rendered space map is even deeper than it looks at first glance. The number of rings around each planet depicts how many spacecraft have orbited that planet (most visited: moon), while each imperfect circle represents a capsule's precise path around the planet.
National Geographic has a Flash version here.
(I kinda hate Flash. Who's with me?)
If you want to see or have a static version, you can do both of those here.