Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

Have you ever wondered what our solar system looked like 3.8 billion years ago? Were the planets we know today anything like ...

A newly discovered ice comet from deep space may be over 7 billion years old, making it the most ancient comet scientists ...

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

Astronomers have been given the rare opportunity to study an extrasolar object after the recent discovery of the interstellar ...

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

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, ...

A new interstellar object, A11pl3Z, has been discovered in our solar system, marking the third such object to be observed. It ...

I/ATLAS, earlier known as A11pI3Z, is only the third interstellar visitor to be discovered passing through our corner of the ...

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

Rocky bodies called protoplanets were thought to have formed slightly earlier in the inner solar system than those beyond the ...

Officially named 3I/ATLAS, the comet was confirmed as having originated outside of Earth's solar system on July 3, according ...