The Solar System, home to Earth and countless other fascinating planets and moons, exists within the Milky Way galaxy. But ...

A lone body, making one passage around the Sun for every ten by Neptune, is rewriting the rules of planetary dynamics in the ...

The newly discovered world — a "sednoid" — challenges what planetary scientists thought they knew about the edge of the solar ...

Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our ...

There’s a visitor in town, and its name is 3I/ATLAS. The presumed interstellar comet presents a rare opportunity for ...

For Harold Kozak, one of life’s greatest pleasures is the opportunity to educate the public about the stars and the vast ...

"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today ...

The answers to those questions depend on how we define the death of the solar system.

Astronomers have discovered an object at the edge of the solar system that is locked in a strange rhythmic dance with the ice ...

Astronomers first identified these minerals using the now-three-year-old James Webb Space Telescope. To see where exactly the ...

International astronomers have for the first time witnessed the birth of a planetary system beyond Earth's sun that could one ...

Comet 3I/ATLAS was first identified by the Asteroid Terrestrial-impact Last Alert System (ATLAS), a global network of four ...