By Steven Sweet | 2025-09-07
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Solar Activity
On 09/09/2025 09:58 am by Jim Militello | Tucson, Arizona USA
Hydrogen alpha image of the Sun showing sunspot active regions 4211 and 4213.
Coronado SolarMax 90 Ha solar telescope, ZWO ASI183mm video camera.
The image is a stack of 20 video frames processed with Autostakkert, Registax, Photoshop.
