Order by: Trending (past 30 days)Date ← Go back Calcium sun on November 13, 2025 On 11/13/2025 by Eliot Herman | Website | Tucson, AZ Share Twitter Facebook Reddit LinkedIn Email Calcium sun on November 13, 2025, with departing active sunspot AR4274. Astrophysics 110 mm refractor with calcium filter, ZWO camera. ZWO stack and Photoshop.
