IRIS Movie of the Day
At least once a week a movie of the Sun taken by NASA's Interface Region Imaging Spectrograph (IRIS) is posted by one of the scientists operating the instrument.
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6 May 2019
The polar plume footpoint
Credit: IRIS, LMSAL/NASA, Krzysztof Barczynski
Polar plumes are thin long, dense and usually straight structures observed in the solar poles area at the coronal temperatures. IRIS Si IV images show the upper chromosphere/ transition region structures at the plume footpoint. The movies present the beauty of evolution of the highly dynamics small-scale structures (small-scale structures concentration nearby the slit). The IRIS slit is located at the plume footpoint by the whole observation. Observations like this will helps us understand the origin and evolution of the solar plumes.