File:Pôle nord de saturne et aurora.jpg

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Pôle_nord_de_saturne_et_aurora.jpg ‎(448 × 448 pixels, file size: 29 KB, MIME type: image/jpeg)

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English: This nighttime view of Saturn's north pole by the visual and infrared mapping spectrometer on NASA's Cassini orbiter reveals a dynamic, active planet at least 75 kilometers (47 miles) below the normal cloud tops seen in visible light. Clearly revealed is the bizarre six-sided hexagon feature present at the north pole. This image is one of the first clear images of the north polar region ever acquired from a unique polar perspective. In this image, the blue color shows high-altitude emissions from atmospheric molecules excited by charged particles smashing into the atmosphere along Saturn's powerful magnetic field lines, producing the aurora at very high altitudes in Saturn's atmosphere. The red color indicates the amount of 5-micron wavelength radiation, or heat, generated in the depths of the warm interior of Saturn that escapes the planet. Clouds blocking this light are revealed as silhouettes against the background thermal glow of the planet.
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Source http://photojournal.jpl.nasa.gov/catalog/PIA09185 Nasa
Author NASA/JPL/University of Arizona
This image or video was catalogued by Jet Propulsion Laboratory of the United States National Aeronautics and Space Administration (NASA) under Photo ID: PIA09185.

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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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Date/TimeThumbnailDimensionsUserComment
current08:34, 10 April 2009Thumbnail for version as of 08:34, 10 April 2009448 × 448 (29 KB)Akhenathon (talk | contribs){{Information |Description=Saturn's North Pole Hexagon and Aurora |Source=[http://www.nasa.gov/mission_pages/cassini/multimedia/pia09185.html Nasa] |Date=27 juillet 2003 |Author=Nasa |Permission= |other_versions= }}

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