By Cecille Kennedy | 2025-05-17
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Solar Activity
On 05/18/2025 12:10 pm by Jim Militello | Tucson, Arizona USA
Hydrogen alpha image of the Sun showing AR4087 in the center with a nice sunspot, a few filaments, and some 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.
