There are some gorgeous images taken by the crew of the Columbia before it broke up on reentry, courtesy of NASA. I’ve taken two of my favorites and turned them into 1024×768 desktop images, which you can grab here if you like.
On the left: “STS107-E-05697 (26 January 2003) — A quarter moon is visible in this oblique view of Earth’s horizon and airglow, recorded with a digital still camera aboard the Space Shuttle Columbia. (NASA caption)” (Original high-resolution version)
On the right: “STS107-E-05070 (18 January 2003) — The bright sun dissects the airglow above Earth’s horizon in this digital still camera’s view photographed from the Space Shuttle Columbia. (NASA caption)” (Original high-resolution version)
(From lies.com via Dave Winer)