Order by: Trending (past 30 days)Date ← Go back Calcium-filtered sun on January 17, 2026. Colorized. On 01/17/2026 by Eliot Herman | Website | Tucson, Arizona Share Twitter Facebook Reddit LinkedIn Email Calcium-filtered sun on January 17, 2026. Colorized. Lunt calcium module on an Astrophysics 110 mm refractor. ZWO stack and Photoshop.
