Scientists have identified interstellar comet 3I/ATLAS as the oldest known object to pass through the solar system, dating back 10–12 billion years. James Webb Space Telescope observations show it ...

In July 2025, astronomers detected 3I/ATLAS, a rare interstellar comet, prompting SETI researchers to scan it for alien ...

In July 2025, astronomers spotted something remarkable passing through our Solar System, an object that had not come from ...

A new study into the 3I/ATLAS interstellar comet points to it having been born as far back as 12 billion years ago in a very ...

A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

An interstellar comet that passed through the Solar System last year may be up to 12 billion years old – far older than the Sun.

The interstellar comet emitted methane, a potential biosignature, as it passed the sun, physicist Avi Loeb says.

An interstellar comet that recently passed through the solar system may have formed as long as 12 billion years ago, making ...

A strange interstellar comet discovered last year and speculated by a prominent astronomer to be an alien spacecraft could be ...

An interstellar comet that blazed past the sun and swung by Earth last year could be nearly three times older than our solar system and is unlike anything ever before seen in our cosmic backyard, ...

Researchers say 3I/ATLAS could be 12 billion years old and has a composition unlike anything in our solar system.