Flickr user gadl made this "planet" out of a 360° panorama built from 80 individual photos. See the entire photoset: Wee Planets [flickr] - via As Above
Also, check out Jeffrey Martin's newest panorama of Prague: Old Town Square Christmas - Thanks Jeffrey!
Looks like it would be just as difficult to play golf on.
By all means, anyone who's interested, read the tutorial on how to create this kind of images here: http://www.deviantart.com/deviation/31978224/