Awesome Deep Space Screen Saver 

A screen saver with beautiful images of deep space objects by the Hubble Telescope. All photos are 800x600 high-quality images (1024x768 avail). This 5-photo version is free, the Gold Edition has 42 photos and may be purchased at Awesome-Screens.com
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DeepSpace 

33 photos taken from the Hubble Space Telescope. Use this versatile screen-saver engine which rotates 33 photos of colorful deep space stars, nebulas, and galaxies and an optional soundtrack of MIDI-based tunes.
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