A mystery interstellar object discovered last week is likely to be the oldest comet ever seen—possibly predating our solar ...

I/ATLAS isn't just fascinating because it is the third interstellar visitor found in the solar system; new research suggests ...

When the news started to spread on July 1, 2025, about a new object that was spotted from outside our solar system, only the ...

A rare interstellar comet is flying through our solar system. Here's how—and when—you might be able to see Comet ATLAS from ...

Aster G. Taylor is a Ph.D. candidate in Astronomy and Astrophysics at the University of Michigan, Ann Arbor and a 2023 Fannie ...

Astronomers tracking an interstellar object flying through the solar system think it comes from a star at least 8 billion ...

A week and a half after its discovery, there are clues about the origin and age of the interstellar comet 3I/ATLAS – and ...

Captured just days after its discovery, the images offer the clearest view yet of this rare visitor from beyond our solar system.

A mystery interstellar object discovered by a British astronomer is most likely the oldest comet ever seen. The "water ...

For only the third time in recorded history, an interstellar object has crossed into our solar system, creating quite the ...

The ATLAS (short for Asteroid Terrestrial-impact Last Alert System) is a NASA-funded program developed by the University of ...

Scientists now say an interstellar comet discovered earlier this month could be one of the oldest that astronomers have ever encountered.