Two comets are set to light up the night sky, one of which will not be seen again for over 1,000 years.

C/2025 R2 (SWAN) and C/2025 A6 (Lemmon) are expected to be visible across the country this month, weather permitting. They are predicted to make their closest approach on Tuesday evening, Oct. 21. Both comets should be visible in the western and southern skies starting about 45 minutes after sunset and continuing into the night, according to Forbes .

Lemmon, which is a rare green comet, can be seen with the naked eye on Oct. 21, according to the Royal Astronomical Society , with peak visibility near Halloween. SWAN may be visible using binoculars or a telescope, according to Starwalk , a real-time astronomical app for stargazing.

The green comet was first discovered in Januar

See Full Page