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

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

At the time, astronomer Jerry Ehman spotted the highly unusual outburst in printed out records, annotating the major radio ...

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

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

There are quite a few other places we might find life in the solar system, including dwarf planets like Ceres. Ceres is ...

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

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its ...

NASA is tracking an object that is entering the solar system at approximately 245,000 km/h. This interstellar visitor is ...

Astrophysicist and author Neil deGrasse Tyson explains the theory behind the growing evidence about a possible hidden planet ...

While Planet Y has been not yet been directly observed, unexpected inclinations found in the orbits of roughly 50 distant ...

CREDIT: ALMA(ESO/NAOJ/NRAO)/M. McClure et al. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of ...