Comet 3I/ATLAS, only the third interstellar object ever observed, is making its final pass through our skies, offering a rare last glimpse before vanishing into deep space forever.

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 ...

Space, it’s full of surprises. An object, discovered at the beginning of the year, was first thought to be an asteroid. But then it grew a tail. Astronomers with the Mount Lemmon Survey in Arizona ...

Stargazers eager to catch a rare green comet in the sky tonight, Saturday, Oct. 25, are in for a double cosmic treat as Comet Lemmon and Comet SWAN are close to Earth and visible in the sky this ...

A comet that was discovered in January will make its closest approach to Earth on Tuesday. If you don’t see it this time around, the only way to see it again is with the help of time travel because it ...