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calcium-arcade
https://www.astronomy.com/picture-of-the-day/photo/calcium-arcade/
Calcium arcade | Astronomy Magazine
Chris Schur from Payson, Arizona A magnificent arcade of coronal loops appeared on the Sun’s limb Sept. 1, 2024, captured here with a 3.2-inch refractor, CMOS camera, and a Calcium-K filter. These arcing features are caused by glowing plasma trapped in the Sun’s magnetic field. While often seen in Hα, they are less frequently visibleContinue reading “Calcium arcade”
https://www.astronomy.com/uploads/2024/12/FullDisk-CaK-090124-Schur-1568×1322.jpg
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2024-12-18
2024-12-18
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Chris Schur from Payson, Arizona
A magnificent arcade of coronal loops appeared on the Sun’s limb Sept. 1, 2024, captured here with a 3.2-inch refractor, CMOS camera, and a Calcium-K filter. These arcing features are caused by glowing plasma trapped in the Sun’s magnetic field. While often seen in Hα, they are less frequently visible in the Sun’s fainter CaK emission.
