By Malcolm Triggs | 2025-12-07
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Solar Activity
On 12/19/2025 11:50 am by Jim Militello | Tucson, Arizona USA
Hydrogen-alpha image of the Sun showing active region 4312 along with some filaments and prominence.
Coronado SolarMax 90 Ha solar telescope, ZWO ASI183mm video camera.
The image is a stack of 30 video frames processed with Autostakkert, Registax, Photoshop.
