The space rock 3I/ATLAS is only the third confirmed interstellar object discovered by astronomers, following 'Oumuamua and the comet Borisov. While astronomers are still busily collecting data on the ...

Ever since interstellar object 3I/ATLAS streaked into our solar system, astronomers have been scrambling to understand how this likely comet got here—and more importantly, perhaps, where it came from.

A comet that was born in another solar system and could be billions of years old is hurdling through Earth’s solar system — a discovery made on July 1 that’s led some astronomers to speculate that the ...

Add Yahoo as a preferred source to see more of our stories on Google. A comet that is likely much, much older than our solar system has spent months traipsing through Earth's cosmic neighborhood. And ...

Astronomers have, for the first time, directly measured the water isotope composition of an interstellar comet, revealing ...

Scientists in Boulder are using existing NASA spacecraft to track a rare interstellar comet called 31/ATLAS as it travels through Earth’s solar system. Comet 3I/ATLAS was first observed on July 1 and ...

Astronomers have measured the highest-ever heavy water ratio in an interstellar object, found in comet 3I/ATLAS. ALMA observations reveal its birthplace was far colder and more shielded than our solar ...

A team of astronomers from the European Space Agency have found that a huge interstellar object in space is ejecting water ...

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Research on X-ray and gamma-ray beams highlights their advantages in interstellar communication, offering new strategies for detecting extraterrestrial signals.