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

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

Astronomers have discovered fresh evidence suggesting the possible existence of an unseen planet in the far reaches of our ...

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.

Astronomers found that interstellar object 3I/ATLAS shows an "extreme abundance ratio" of nickel and iron in its gas plume.

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

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

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 ...

The asteroid belt may seem permanent, but it is far from static. Its slow decline reveals a more violent past when more ...

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

Just two decades after astronomers discovered the first exoplanet, NASA has confirmed the existence of 6,000 alien worlds.