The interstellar comet 3I/Atlas reached its closest point to the sun. Here's how to follow the rest of its journey away from ...

Perihelion is the point on an orbital course that brings a body closest to the sun. C/2025 K1 (ATLAS) is an Oort cloud comet ...

Having made its closest approach to the sun on Wednesday October 29, comet 3I/ATLAS will soon be visible from Earth ...

It was early January 2025 when a faint light spot was observed at the Mt. Lemmon Observatory in Arizona. Follow-up observations revealed that the object was a comet visiting from the outer edge of the ...

Comet C/2025 A6 (Lemmon), captured from the Dark Sky Alqueva Observatory in Portugal on October 2, 2025, glows green as it nears its closest approach to Earth. Here’s how to see this rare green comet ...

After briefly escaping from Earth's view during a (very) close approach to the sun on Oct. 30, Comet 3I/ATLAS can finally be ...

A bright new solar system comet could put on a show in the October night sky as it zooms past Earth. Comet C/2025 R2 (SWAN) was discovered on Sept. 10 by Ukrainian amateur astronomer Vladimir Bezugly.

A photographer says he feels "very lucky" to have captured Comet C/2025 A6. Also known as Comet Lemmon, it was first detected ...

A comet discovered earlier this year, now just bright enough to be visible to the naked eye, is poised to be among the top celestial events of 2025. Known as C/2025 A6 (Lemmon), this celestial ...

A comet discovered earlier this year, now just bright enough to be visible to the naked eye, is poised to be among the top celestial events of 2025. Known as C/2025 A6 (Lemmon), this celestial ...

Skywatchers of Arizona should clear their schedules. The next few weeks will feature the appearance of supermoons and meteor showers. Plus, there will also be a pair of comets visible in the night sky ...

Scientists who study comets are struggling to keep up with popular speculation that the interstellar object 3I/ATLAS was sent ...