A large lunar crater featured in the iconic 'Earthrise' photo has just helped the European JUICE spacecraft hone its alien-hunting instruments during a once-in-a-lifetime flyby.

The largest interstellar comet discovered could be an alien technology. The newly found Manhattan-sized object, named ...

Earlier this month, astronomers observed a mysterious object with interstellar origins speeding through the inner solar system. It's an exceedingly rare occurrence, marking only the third confirmed ...

Astronomers have, for the first time, captured what they believe are the very first moments of rocky planet formation around ...

Astronomers have confirmed the third interstellar object on record is dashing through our solar system. Dubbed 3I/ATLAS, it appears to be a comet and is thought to have flown in from the direction of ...

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

Is there a massive undiscovered planet on the outer reaches of the Solar System? The idea has been around since before the ...

"From a habitability standpoint, that's kind of the end of the solar system," Alan Stern, a planetary scientist and principal ...

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

For Harold Kozak, one of life’s greatest pleasures is the opportunity to educate the public about the stars and the vast ...

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

The object, a celestial body from another star system, was discovered on Tuesday by the University of Hawaii’s Asteroid Terrestrial-impact Last Alert System, or ATLAS, team. At this point, it remains ...