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

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

For centuries, humanity believed that Earth was the center of the universe, a view championed by Aristotle and Ptolemy. But ...

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.

Up to 200 worlds investigated by NASA's exoplanet-hunting TESS satellite could be bigger than predicted, a finding that could ...

According to the paper laying out the research behind the discovery, "TOI-1846b is a super-Earth-sized planet, with a radius ...

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

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

So, while Earth will eventually leave the solar system one way or another, it's not something we will have to worry about for a few billion years yet. Probably. Originally published on Live ...

A group of international researchers said on Wednesday they witnessed some of the earliest stages of a planet beyond the sun ...