Two green comets — Lemmon (C/2025 A6) and SWAN (C/2025 R2) — are becoming visible from the Northern Hemisphere in binoculars or a small telescope. They’ll get brighter around Oct. 20-23 as the Orionid meteor shower peaks, but comet Lemmon in particular is now being widely observed. Here’s how to find them on Saturday, Oct. 11, 2025.
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