By Michelle Bishop | 2025-02-04
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menacing sun
On 02/04/2025 10:19 am by Patricio Leon| Santiago, Chile
complex spot AR3981 maintains its predominance due to its complexity and delta magnetic component, possible source of X flares; no news in the remaining sun face.
Newt 4.5" + solar film, 1/640s ISO100
crop, B/C
