Sun in h-alpha/helium D3 (Spectroheliogram)
Taken by Richard Schrantz on November 4, 2025 @
Nicholasville, Kentucky, USA
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Details:
Here is the sun from this morning in h-alpha and helium D3. 102mm f/7 spectroheliograph. ASI183mm camera. Helium shows coronal hole compared to SDO satellite 211 A image.
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