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

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

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

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

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

Astronomers have discovered a significant “growth spurt” in a rogue planet outside of our solar system. The free-floating ...

A NASA mission, IMAP, and two more spacecraft that will study space weather are traveling through space atop a single SpaceX ...

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

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

FBI boss Kash Patel gave New Zealand officials 3D-printed guns illegal to possess under local laws Rory McIlroy blasts ...

IMAP (short for "Interstellar Mapping and Acceleration Probe") is the primary payload on today's flight. The roughly $600 ...

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