By Sudhir Sharma | 2025-08-26
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active sun
On 08/27/2025 10:28 am by Patricio Leon | Santiago, Chile
giant sunspot AR4197 keeps growing, the western component alone measures about 4.5 x 3 Earths, slightly bigger than spot AR4199. No M class flares today but complex 4197 maintains the gamma magnetic component so it could emit one in any moment.
Newt 4.5" + solar film, 1/640s ISO100
crop, B/C
