NASA's Solar Dynamics Observatory's AIA captured its 100 millionth image of the sun on Jan. 19, 2015.
The Atmospheric Imaging Assembly on NASA’s Solar Dynamics Observatory captured its 100 millionth image of the sun on Jan. 19, 2015. The dark areas at the bottom and the top of the image are coronal holes — areas of less dense gas, where solar material has flowed away from the sun.
Credit: NASA/SDO/AIA/LMSAL
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