Comet Lemmon (C/2025 A6) makes its closest approach to Earth on Oct. 21, about 24 hours after the fainter Comet SWAN (C/2025 ...

A pair of once-in-a-lifetime comets will rocket through our skies this October, and it's a rare treat because they won't be ...

Astronomer Gianluca Masi and his Virtual Telescope Project will host a special livestream on Oct. 20 beginning at 1:30 p.m.

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

Comet C/2025 R2 (SWAN) was discovered on Sept. 10 by Ukrainian amateur astronomer Vladimir Bezugly. It has brightened ...

Comet C/2025 A6 (Lemmon) is this year’s brightest comet visible from Earth—an icy relic from the solar system’s origins that ...

Learn when and where to see Comet Lemmon and Comet SWAN this October as they light up the night sky in a rare double comet ...

Comets Lemmon and SWAN will be at their brightest just as the annual Orionid meteor shower produced by Halley's Comet reaches ...

A pair of newly identified comets are jointly appearing in the October sky, and it’s possible to see both — if you know where ...

It will be a while before you can see it for yourself, however. Halley’s comet was last visible from Earth in 1986, meaning ...

Seeing more than one comet in a single month is unusual, making this a rare opportunity for skywatchers. What to know.

A rare, green-glowing comet will make its closest approach to Earth next week — and it won’t return for more than a thousand ...