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    Soleil - NASA - Gradient Sun

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    Watching a particularly beautiful movie of the sun helps show how the lines between science and art can sometimes blur. But there is more to the connection between the two disciplines: science and art techniques are often quite similar, indeed one may inform the other or be improved based on lessons from the other arena. One such case is a technique known as a "gradient filter" -- recognizable to many people as an option available on a photo-editing program. Gradients are, in fact, a mathematical description that highlights the places of greatest physical change in space.

    This video is public domain and can be downloaded at: http://svs.gsfc.nasa.gov/goto?11112

    Source :: http://www.youtube.com/watch?v=aUL4JY15jSg