8 unforgettable photos of the sun taken by the Solar Dynamics Observatory

Over the weekend, NASA's Solar Dynamics Observatory (SDO) hit a major milestone. Just under five years after its launch, on Jan. 19, SDO captured its 100 millionth image of the sun. That's eight whole zeros, folks. Using the Atmospheric Imaging Assembly (AIA), an instrument which, as NASA explains, "uses four telescopes working parallel to gather eight images of the sun – cycling through 10 different wavelengths – every 12 seconds," as well as two other instruments on board, SDO delivers an...

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