The green comets visible in the night sky are now at their minimum distance from Earth, so they should be at their brightest in the night sky. Comet Lemmon (also called C/2025 A6) and Comet SWAN (C/2025 R2) are the first comets visible in binoculars since Comet Tsuchinshan-ATLAS in October 2024. Both are visible after sunset from the Northern Hemisphere, but Tuesday, Oct. 21, is the last chance to also see Lemmon before sunrise.
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