By Christoph Stopka | 2025-02-12
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sun evolving
On 02/12/2025 10:36 am by Patricio Leon | Santiago, Chile
new bipolar sunspot AR3992, close to center sun, grew from nowhere to a respectable size in the last 24 hours ; no other significant changes are noted. Six months after peak of this solar cycle as numbers seem to show.
Newt 4.5" + solar film, 1/640s ISO100
crop, B/C
