By Teresa Molinaro | 2025-04-15
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Solar Activity
On 04/20/2025 10:52 am by Jim Militello | Tucson, Arizona USA
Hydrogen alpha image of the Sun showing numerous sunspots, active regions, filaments, and some nice prominence.
Coronado SolarMax 90 Ha solar telescope, ZWO ASI183mm video camera.
The image is a stack of 40 video frames processed with Autostakkert, Registax, Photoshop.
