Interstellar comet 3I/ATLAS is tearing across the inner solar system at roughly 130,000 miles per hour, a speed that turns ...

The other two known interstellar comets did not offer such an opportunity.

3I/ATLAS has passed its closest point to Earth, meaning we will soon lose sight of it for good. Some scientists want to send a spacecraft to chase down the alien comet — or the next interstellar ...

3I/ATLAS is the third interstellar visitor ever to visit the solar system having been formed around a distant star. Tune in ...

Watch the final live stream of interstellar comet 3I/ATLAS on. Join the Virtual Telescope Project to see this rare visitor ...

Tune in today (Jan. 16) to bid farewell to interstellar comet 3I/ATLAS, courtesy of a livestream from the Virtual Telescope ...

Astrophotographer Brennan Gilmore captured this photo of Comet Lemmon on October 4, 2025 from central Virginia. No two comets are exactly alike. While SWAN’s orbit is very well aligned with the plane ...

Another comet, C/2025 A6 Lemmon, is possibly becoming bright enough to be visible to the naked eye in the coming days.(WTOP/Greg Redfern) A year ago, the D.C. region was enthralled with Comet A3 ...

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 ...

The two green comets continue to shine brightly in twilight each evening for lucky skywatchers with binoculars in the Northern Hemisphere. For observers on Friday, Oct. 24, the bright Comet Lemmon ...

No two comets are exactly alike. While SWAN’s orbit is very well aligned with the plane of the planets as they orbit the sun, Lemmon’s orbit is highly inclined, tipped by more than 140 degrees, ...