Interstellar comet 3I/ATLAS is about to vanish from view. Earth and this interstellar interloper will be on opposite sides of the Sun for a little while. The glare of our star will be blocking the ...

In October, a newly discovered comet will come so close to Earth that people may be able to make out its heavenly fireworks ...

Newly discovered comet C/2025 R2 (SWAN) will soon be gracing our evening sky. Here's how to see it and what to expect.

The comet will come closest to Earth on Oct. 20. There's hope that it may become bright enough to glimpse with the naked eye.

While we haven't seen an interstellar comet being struck by a coronal mass ejection before, we have seen it happen to others. This happened on April 20, 2007, when NASA's STEREO A spacecraft saw Comet ...

Comet SWAN isn't the biggest or brightest comet that can be seen from Earth, but it could be the last one until Halley's ...

It could mean two bright comets will be visible in the night sky at the same time, on the peak night of a meteor shower.

A new comet, nicknamed SWAN25F, was given its official designation as C/2025 F2. The comet was co-discovered by Vladimir Bezugly and Michael Mattiazzo. The comet is best viewed looking toward the east ...

Few cosmic visitors have captured the fascination of astronomers quite like the interstellar comet 3I/ATLAS. Hurtling through ...

The interstellar comet 3I/ATLAS, a rare visitor from outside the Solar System, might have been spewing gases for months ...

Comet C/2025 R2 (SWAN) passed perihelion – its closest point to the sun – on September 12, at a distance of roughly 75.20 ...