Observing 3I/ATLAS in this active phase will give some of the clearest insights yet into the mystery of interstellar comets.

A comet from another star system is swinging by Mars as a fleet of spacecraft trains its sights on the interstellar visitor.

Vladimir Bezugly first observed the new comet, called C/2025 R2 (SWAN) or SWAN25B on Thursday, Sept. 11, in images snapped ...

NASA's Hubble Space Telescope has gotten an up-close look at a headline-grabbing object known as 3I/ATLAS that has recently wandered into Earth's cosmic neighborhood from far away. The image, which ...

Named 3I/ATLAS, the comet is only the third known interstellar object to enter our solar system, and it's the largest and ...

The Hubble Space Telescope has captured the best picture yet of a high-speed comet visiting our solar system from another star. NASA and the European Space Agency released the latest photos Thursday.

A long-tailed comet named C/2025 R2 (SWAN) was first spotted near the sun on 12 September. NASA’s Solar Dynamics Observatory ...

NASA has discovered a new interstellar comet that's currently located about 420 million miles away from Earth. The space agency spotted the quick-moving object with the Atlas telescope in Chile on ...

A newly discovered interstellar comet is puzzling astronomers as it speeds through our solar system with a chemical profile unlike anything seen before. Officially named 3I/ATLAS, it's only the third ...

CAPE CANAVERAL, Fla. — NASA has discovered an interstellar comet that’s wandered into our backyard. The space agency spotted the quick-moving object with the Atlas telescope in Chile recently, and ...

Skywatchers are in for a treat this October. Two comets, C/2025 R2 (SWAN) and C/2025 A6 (Lemmon), may become visible to the naked eye. Both comets will approach Earth around October 21. The Orionid ...