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

A tiny object far beyond Pluto, newly discovered by the Subaru Telescope, could reshape our understanding of the early Solar ...

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

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

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

"This is a big step in understanding the outer solar system," team leader Rosemary Pike from the Center for Astrophysics | ...

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

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

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

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

For the first time, international researchers have pinpointed the moment when planets began to form around a star beyond the ...