NASA launched the Solar Dynamics Observatory (SDO) spacecraft to geosynchronous orbit (around Earth) in 2010. the Atmospheric Imaging Assembly (AIA) project on board SDO photographs our Sun every 15 minutes (24/7/365) using four multi-wavelength telescopic cameras (and NASA posts the images at http://sdo.gsfc.nasa.gov/data/aiahmi/). NASA’s photos record extreme ultraviolet light, well beyond our visible spectrum.
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rainbow hue variations (pocket edition)
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