The interstellar comet 3I/ATLAS is barreling toward its closest point to the sun as perihelion looms on Oct. 29. How different will it look when it reappears on the other side?

Comet 3I/ATLAS is warming up as it approaches the sun, causing a jet to emerge. The jet is visible in a dramatic new image.

Astronomers have found signs that the small icy world Chiron, orbiting between Saturn and Uranus, may be forming a new ring ...

The interstellar object 3I/ATLAS has gathered significant scientific attention, and soon it will reach its closest point to ...

Skywatchers can catch a rare glimpse of Comet Lemmon this month, and it won't be back until around the year 3175. Here's how ...

Lemmon, which is a rare green comet, can be seen with the naked eye on Oct. 21, according to the Royal Astronomical Society, ...

Comet Lemmon (C/2025 A4) will make its closest approach to Earth on November 8th, and is currently visible to the naked eye ...

The Orionid meteor shower peaks during a new moon, Comet Lemmon gets closest to Earth and a crescent moon slides past Mercury ...