By Jim Militello | 2025-01-09
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the only living spot in the sun
On 01/09/2025 11:11 am by Patricio Leon| Santiago, Chile
the big dark core of AR3947 is the last remaining notorious spot in the sun face, its surface area equivalent to 5 Earths is just inside the edge of detection by unaided vision
Newt 4.5" + solar film, 1/640s ISO100
crop, B/C