For years, scientists have been scanning the icy outskirts of our Solar System for an unknown massive planet. The ...

This week, astronomers spotted the third known interstellar visitor to our Solar System. First detected by the Asteroid ...

Astronomers have discovered a new object that originated outside of our Solar System - only the third to be found.

NASA has discovered a new interstellar comet that's currently located about 420 million miles away from Earth. The space ...

Officially named 3I/ATLAS, the comet was confirmed as having originated outside of Earth's solar system on July 3, according ...

The space agency spotted the quick-moving object with the Atlas telescope in Chile earlier this week, and confirmed it was a ...

PARIS, France - Astronomers on Wednesday confirmed the discovery of an interstellar object racing through our Solar System -- ...

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, ...

A new investigation into old Kepler data has revealed that a planetary system once thought to house zero planets actually has ...

We have discovered two interstellar objects so far, ’Oumuamua and Comet 2I/Borisov. ’Oumuamua had no dust tail and a significant nongravitational acceleration, which led to a wide variety of ...

Harvard physicist Avi Loeb revealed that the object is expected to approach Earth on December 17, speeding through the solar ...

NASA has discovered 3I/ATLAS, only the third known interstellar object, now passing through our solar system from the ...