Interstellar comet 3I/ATLAS, a visitor older than the Sun, has stunned scientists with a colossal, puzzling X-ray cloud ...

A giant, 250,000-mile X-ray cloud has been found around the interstellar comet 3I/ATLAS, baffling experts. Discover why this ...

XRISM’s Xtend telescope captured the first X-ray image of interstellar comet 3I/ATLAS, revealing a faint X-ray glow and ...

The X-ray astronomy satellite XRISM observed the comet 3I/ATLAS and targeted its X-ray emissions to discern the object’s ...

A viral tweet claims new XRISM images show interstellar comet 3I/ATLAS glowing like a spaceship engine, fuelling speculation ...

The emission of X-rays is usually the domain of the energetic events of the universe: hot stars, supermassive black holes, ...

Astronomers studying the interstellar comet known as 3I/ATLAS have detected a vast and unexpected X-ray halo extending ...

Stunning new photos show the pieces of the "other ATLAS," C/2025 K1, breaking apart in space after the golden comet suddenly exploded earlier this month. When you purchase through links on our site, ...

Tune in on Nov. 24 to watch live telescopic views of the fractured comet C/2025 K1 (ATLAS), which recently broke into multiple large pieces following a close brush with the sun. The livestream, ...

The interstellar comet 3I/ATLAS will make its closest approach to Earth on Dec. 19. Originating from outside our solar system, the comet is not a threat to Earth. While not visible to the naked eye, ...

The interstellar comet 3I/ATLAS is set to make its closest approach to Earth in December. 3I/ATLAS is the third-ever discovered object confirmed to have originated from outside our solar system. While ...

Since the interstellar comet 3I/ATLAS was discovered this past July — just the third confirmed object to arrive from another star — astronomers have been closely following its passage through our ...