By Tom Cofer | 2025-08-21
Order by: Trending (past 30 days)Date
Solar Activity
On 08/22/2025 09:58 am by Jim Militello | Tucson, Arizona USA
Hydrogen alpha image of the Sun with sunspot region 4191. Also some nice prominence and filaments.
Coronado SolarMax 90 Ha solar telescope, ZWO ASI183mm video camera.
The image is a stack of 20 video frames processed with Autostakkert, Registax, Photoshop.
