Saturn eclipsing the sun, seen from behind from the Cassini orbiter. The image is a composite assembled from images taken by the Cassini spacecraft on 15 September, 2006. See http://commons.wikimedia.org/wiki/File:Saturn_eclipse.jpg for more information.
This presentation on the rings of the planet Saturn is a showcase for the features of burst s5, a presentation tool based on HTML and other standard formats using an open source toolchain.
(Hint: Press F11 on Firefox to get fullscreen mode.)