By Mario Rana | 2025-07-11
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evolving sun
On 07/11/2025 10:08 am by Patricio Leon | Santiago,Chile
big spot 4136, at upper left, has acquired a delta magnetic component in the last day and, at the same time, its dark core shows signs of impeding cleavage; in the central northern sun a completely new sunspot has appeared, AR4138, with a balanced bipolar structure
Newt 4.5"+ solar film, 1/640s ISO100
crop, B/C
