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

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 ...

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

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

CAPE CANAVERAL, Fla. — Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby ...

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

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

“What we’ve been trying to do is find a baby version of our Solar System somewhere else,” Merel van’t Hoff, an astronomer at Purdue University in West Lafayette, Indiana, tells Nature’s Jenna Ahart.

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's not aliens.) ...

The Solar System is a fascinating place, with each planet orbiting the Sun at its own unique distance. But how far apart are ...