The interstellar visitor, only the third such object to be discovered passing through our solar system, ignited controversial ...

A Harvard scientist has suggested that our Solar System may be far more crowded with interstellar objects than anyone ...

For millions of years, a frozen wanderer drifted between the stars before slipping into our solar system as 3I/ATLAS—only the ...

Harvard scientist Avi Loeb suggests comet 3I/ATLAS may be an alien vessel seeding life, after NASA's SPHEREx spacecraft detected unexplained methane and organic chemicals on board.

The mysterious space rock that passed through our solar system grew significantly brighter as it left, according to ...

The fate of a comet that was predicted to pass close to Earth remains a mystery five years after its dramatic breakup in the ...

As next-generation telescopes map this outer frontier, astronomers are bracing for discoveries that could reveal hidden planets, strange structures, and clues to the solar system’s chaotic youth.

NASA’s SPHEREx telescope observed a dramatic outburst from interstellar comet 3I/ATLAS after its October 2025 solar flyby. Infrared data revealed water vapor, carbon dioxide, methanol, methane, and ...