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

Using the world's most advanced radio telescopes, astronomers have discovered a spinning dead star so rare, strange and ...

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

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