A pair of once-in-a-lifetime comets are rocketing through our skies right now, and it's a rare treat because they won't be back for hundreds of years. The comets, C/2025 A6 (Lemmon) and C/2025 R2 (SWAN),

This long-duration comet will make its closest approach to Earth this fall, before disappearing into the outer solar system for another 1,000 years.

The brighter Comet Lemmon is visible in the northwest in Serpens, and Comet SWAN in the southwest in Aquarius, about 90 minutes after sunset. Lemmon is moving quickly west of the Big Dipper, near bright Arcturus, while the dimmer SWAN lies beneath the three stars that form the Summer Triangle.

Comet C/2025 A6 (Lemmon) is this year’s brightest comet visible from Earth—an icy relic from the solar system’s origins that won’t return until the next millennium.

Comets Lemmon and SWAN are nearing Earth in a rare double cosmic treat. Where and what time can you see them? What to know.

A rare opportunity to see not one but two comets awaits skygazers this October. We show where and how to view them.

Skywatchers are anticipating prime viewing conditions for an annual showing of shooting stars and two comet flybys

Known as C/2025 A6 (Lemmon), this celestial wanderer is currently in the western sky after sunset, not far from the Big Dipper, and is well placed for viewing as the sky gets dark. Astronomers discovered the comet in January as part of the Mount Lemmon Survey in Arizona and calculated that it’s on a 1,

Comet Lemmon can be seen in the northwestern sky near the bright star Arcturus. Skywatchers should use the Big Dipper to locate the comet, which appears just below the handle of the constellation. Yes. Comet Lemmon visibility is bright enough to see with the naked eye, though a telescope or binoculars offer a more detailed view.

A pair of once-in-a-lifetime comets is rocketing through our skies right now, and it's a rare treat because they won't be back for hundreds of years. The comets, C/2025 A6 (Lemmon) and C/2025 R2 (SWAN),