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Fast-Growing Sunspot
Posted on Wednesday, February 20, 2013
Uploaded by
Waspie_Dwarf

Image credit: NASA/SDO/AIA/HMI/Goddard Space Flight Center
Uploader comment: The bottom two black spots on the sun, known as sunspots, appeared quickly over the course of February 19-20, 2013. These two sunspots are part of the same system and are over six Earths across.
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