Two Weeks in the Life of a Sunspot

  • Released Friday, August 4th, 2017
  • Updated Wednesday, May 3rd, 2023 at 1:47PM
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On July 5, 2017, NASA’s Solar Dynamics Observatory watched AR26665, an active region — an area of intense and complex magnetic fields — rotate into view on the sun. The satellite continued to track the region as it grew and eventually rotated across the sun and out of view on July 17.

GIF of AR26665

GIF of AR26665

GIF of CME released by AR26665 after it completed a trip across the face of the sun. This view is from NASA's STEREO mission, and was observed on the far side of the sun on July 23, 2017. GIF Credit:NASA’s Goddard Space Flight Center/STEREO/Bill Thompson

GIF of CME released by AR26665 after it completed a trip across the face of the sun. This view is from NASA's STEREO mission, and was observed on the far side of the sun on July 23, 2017. GIF Credit:

NASA’s Goddard Space Flight Center/STEREO/Bill Thompson



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NASA's Goddard Space Flight Center


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