CAPE CANAVERAL, Fla. (AP) — Astronomers say they've spotted an object in our solar system that's believed to be from another ...

Mount Everest may be the tallest mountain on Earth, but it's nothing compared to the towering giants scattered across our ...

Rocky bodies called protoplanets were thought to have formed slightly earlier in the inner solar system than those beyond the ...

I/ATLAS, earlier known as A11pI3Z, is only the third interstellar visitor to be discovered passing through our corner of the ...

Why is Mars barren and uninhabitable, while life has always thrived here on our relatively similar planet Earth?

Mars, the fourth planet from the Sun, is a subject of fascination for astronomers. Though significantly smaller than Earth, ...

Astronomers are scrambling to gather data on a mysterious object that’s currently hurtling through the solar system.

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

The European Space Agency said Wednesday that scientists have discovered what might be only the third known interstellar ...

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

It's only the third time that experts have spotted an object in the Milky Way that's come from a different solar system. Find out more here.

An interstellar object called 3I/ATLAS is now moving through our solar system, the third one we've seen in the last eight ...