By Victor Rogus | 2026-05-21
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Solar Activity
On 05/21/2026 10:08 am by Jim Militello | Tucson, Arizona USA
Hydrogen-alpha image of the Sun with huge filaments, a few active regions, and some prominence.
Coronado MaxScope 90 Ha solar telescope, ZWO ASI183mm video camera.
The image is a stack of 30 video frames processed with Autostakkert, Registax, Photoshop.
