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

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

Analysis of an ancient meteorite suggests that rocky planets both near and distant from the sun may have formed at the same ...

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

"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.

The finding marks the first time a planetary system has been identified at such an early stage of formation. One U of M ...

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

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

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