Two Green Comets Tap the Night Sky: Lemmon and SWAN As the sky darkens this week, two green comets are making their well-timed return to observers with binoculars. Comet Lemmon (C/2025 A6) and Comet SWAN (C/2025 R2) have shifted from morning-only sightings to more convenient evening viewing, offering a rare chance to watch two active…