Gradient Sun [still]

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    To view a video of the Gradient Sun go to: www.flickr.com/photos/gsfc/8103212817

    Looking at a particularly beautiful image 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. A gradient filter, in turn, enhances places of contrast, making them all the more obviously different, a useful tool when adjusting photos. Scientists, too, use gradient filters to enhance contrast, using them to accentuate fine structures that might otherwise be lost in the background noise. On the sun, for example, scientists wish to study a phenomenon known as coronal loops, which are giant arcs of solar material constrained to travel along that particular path by the magnetic fields in the sun's atmosphere. Observations of the loops, which can be more or less tangled and complex during different phases of the sun's 11-year activity cycle, can help researchers understand what's happening with the sun's complex magnetic fields, fields that can also power great eruptions on the sun such as solar flares or coronal mass ejections.

    The still here shows an unfiltered image from the sun next to one that has been processed using a gradient filter. Note how the coronal loops are sharp and defined, making them all the more easy to study. On the other hand, gradients also make great art.

    NASA/Goddard Space Flight Center

    To download this video go to: svs.gsfc.nasa.gov/goto?11112

    NASA image use policy.

    NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission.

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    kluehirschSnowpine, Richard Skoonberg, and 84 other people added this photo to their favorites.

    1. DavidePhotographer© 30 months ago | reply

      Stupenda veramente qualcosa di stupefacente

    2. LizaLovesNature 30 months ago | reply

      I always see the artist in your works:)

    3. Floating Lantern 30 months ago | reply

      Art and Science are both the process of observation.

    4. The Third-Eye (very limited INTERNET ACCESS) 30 months ago | reply

      Both Art and Science are products of human intelligence.

    5. smartrajesh. 28 months ago | reply

      really fantastic...

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