There are thousands of screen savers you can add to your computer. Many are more interactive than you might think, offering educational content, up-to-date information, and games. Here are some worth checking out.

The Distant Suns—Grand Tour 3D 1.2 (free) offers a stunning view of our solar system using 3D technology and amazing graphics. As the day passes, the planets rotate, transforming your desktop into a 3D telescope. The retail version, The Distant Suns 5.3 ($39.95 direct), offers an even more intense experience.