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

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 ...

The star is surrounded by a protoplanetary disk, and this disk is the first evidence of debris condensing into what will ...

The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

The solar system consists of eight planets, several dwarf planets, hundreds of moons, and billions of asteroids, comets and ...

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

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

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

KQ14, nicknamed "Ammonite", was discovered using the Subaru Telescope and is a highly elliptical object with a perihelion and ...

Astronomers have discovered a "fossil" world lying in the outskirts of the solar system, according to new research.

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