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Saturn's rotating aurora (excerpt)

Saturn's rotating aurora (excerpt)

NASA / JPL-Caltech / SSI / animation by Astro0, unmannedspaceflight.com

Saturn's rotating aurora (excerpt)
This animation consists of 21 frames captured by Cassini on October 7, 2009, focused near Saturn's north pole on the night side of the planet. Each frame is a long exposure, causing background stars to extend into long streaks. There are other small pointlike image artifacts that do not move from frame to frame (so they are most likely hot pixels or some other sort of thing internal to the instrument). There are also occasional cosmic ray hits that produce one-time streaks that aren't visible in subsequent frames. As Saturn rotates, the aurora flares. This is just an excerpt of a much longer animation that can be downloaded here (9.8 MB).

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. For uses not allowed by that license, contact us to request publication permission from the copyright holder: Astro0

Original image data dated on or about October 7, 2009

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