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File: The Sun by the Atmospheric Imaging Assembly of NASA's Solar Dynamics Observatory - 20100819.jpg
Animation_of_Parker_Solar_Probe_trajectory.webm (WebM audio/video file, VP9, length 1 min 27 s, 560 × 420 pixels, 156 kbps overall, file size: 1.61 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
The detailed images recorded by SDO in 2011–2012 have helped scientists uncover new secrets about the Sun. The Solar Dynamics Observatory (SDO) is a NASA mission which has been observing the Sun since 2010. [4] Launched on 11 February 2010, the observatory is part of the Living With a Star (LWS) program. [5]
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For instance, Minor White's photograph of a winter scene, The Black Sun 1955, [1] was a result of the shutter of his camera freezing in the open position, producing severe overexposure. [2] [3] [4] Ansel Adams had also earlier created a solarized sun image, titled Black Sun, Owens Valley, California, 1939, by overexposure. [5]
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On the largest scale, the Sun supports an oscillatory magnetic field, with a quasi-steady periodicity of 22 years. [ 2 ] [ 3 ] This oscillation is known as the Babcock-Leighton dynamo cycle, proposed by Robert B. Leighton , amounting to the oscillatory exchange of energy between poloidal and toroidal solar magnetic field ingredients.