Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

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

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

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

The astronomers observed hot minerals just beginning to solidify – the first specks of planet-forming material, the ...

The future of our solar system has long captivated both scientists and stargazers alike. As highlighted in a recent Live ...

Astronomers have discovered the earliest seeds of planets forming around HOPS-315, a baby star located 1,300 light-years away ...

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

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

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

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