The interstellar object 3I/ATLAS is thought to be roughly 7 billion years old, making it even older than our solar system.

Interstellar comet 3I/ATLAS has caught the interest of astronomers and amateur enthusiasts alike as just the third object to ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

I/ATLAS is a fast, ancient interstellar object. Its odd features fuel both scientific study and speculation. On July 1, ...

Voyager 1 has been exploring the cosmos for decades, but when it reached the edge of the solar system, it found something ...

The National Aeronautics and Space Administration has confirmed an interstellar object is passing through our solar system.

Two recent studies used seismic data from NASA’s retired InSight mission to shed light on what lies beneath Mars’ surface and what it means for the planet’s history The spacecraft will map the ...

3I/ATLAS, an interstellar object currently zipping through the solar system, is capturing the attention of astronomers, the ...

Harvard researcher Avi Loeb says comet 3I/ATLAS weighs 33 billion tons and spans 3.1 miles, making it far larger than ...

A new analysis estimates that the asteroid belt is steadily losing mass each year, and may not be as permanent a feature of ...