It is unclear whether a [3I/ATLAS] would transmit radio signals … such signals would take tens of thousands of years to cross ...

As this interstellar object approached its closest point to Earth, a massive radio telescope attempted to sniff out a ...

A relic from the beginning of the galaxy has finally come out of the sun's shadow. It gives us a rare look at a cosmic history that goes back before our own world. In November 2025, the interstellar ...

3I/ATLAS has passed its closest point to Earth, meaning we will soon lose sight of it for good. Some scientists want to send a spacecraft to chase down the alien comet — or the next interstellar ...

For one, it came down to timing. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. It came from outer space. Interstellar space, to be precise.

The mysterious space rock suggested to be a hostile alien spaceship was due to make its closest approach to Earth today (Dec 19). The rare interstellar visitor, designated Comet 3I/ATLAS, was ...

Did an alien spacecraft just fly by Earth? That’s the question a lot of people, including Harvard astrophysicist Avi Loeb, are asking right now. A massive interstellar object called 3I/ATLAS which ...

U.S. president Donald Trump is expected to sign a defense bill this week that orders a government watchdog to probe a conspiracy theory—promoted by the country’s secretary of health and human services ...