Object 3I/ATLAS is now too far from Earth to aim a telescope at, but prior observations showed some unusual behavior. The anomalous nature of the object led astrophysicist Avi Loeb to apply a thought ...

New data from NASA's SPHEREx and the Hubble Space Telescope show that the object known as 3I/ATLAS has changed in ways that ...

A striking new image of the strange interstellar object 3I/ATLAS has revealed it is growing a tail, offering more proof that it is a comet visiting our Solar System. The suspected comet, discovered on ...

Our solar system’s latest and only third known interstellar visitor is becoming more fascinating by the week. Spotted in early July, the object, dubbed 3I/ATLAS, is widely believed to be a comet. It’s ...

What is this strange object?

NPR's Ari Shapiro talks with astronomer David Jewitt about what we can learn from the third interstellar object to have entered our solar system, a comet-like object known as 3I/ATLAS. A remarkable ...

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 ...

Only four such objects have been discovered, astronomers say. Astronomers have discovered a "fossil" body residing on the outskirts of the solar system, according to new research. The object – which ...

In a universe where change usually unfolds over eons, astronomers have gotten a rare front-row seat to watch a small, icy world beyond Saturn build a brand-new set of rings in real time. A team of ...

A team of astronomers recently discovered a mysterious object in the outer solar system that is in a resonant orbit with Neptune. This object, named 2020 VN40, orbits the Sun every time Neptune ...