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

Nearly a month ago, a mysterious object was seen hurtling through the solar system and later confirmed as an interstellar ...

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

Think we already know all the planets in our solar system? Surprise surprise! 🌌 A mysterious new object with an extreme, ...

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

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

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

Images from two different telescopes give astronomers a glimpse at the formation of a "new" planetary system around a star ...

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

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

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

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