The Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory is a series of devices set up to take images of the Sun every few seconds and through a variety of filters. This video is a 12 hour series of data gathered by the 304Å and 171Å filters. The 304Å filter is designed to see areas of cooler dense filaments and prominences of plasma above the visible surface of the Sun, while the 171Å filter is especially good at showing loops and arcs, activity mostly in the upper transition region and corona. The video highlights a large prominence eruption on the western limb. There are almost 2400 images used to make the frames for the video, 1200 of each wavelength, so this is actual time sped up by almost 1000 times.
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