By Rui Santos | 2025-02-02
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miriad of sunspots
On 02/02/2025 10:13 am by Patricio Leon| Santiago, Chile
the almost null foreshortening and the appearance of big sunspot AR3981 trailing the main group has increased its span to almost 1/3 of the solar face, containing dozens of dark cores. Quite impressive indeed !
Newt 4.5" + solar film, 1/640s ISO100
crop, B/C