If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

Though astronomers have known about the threat posed by near-Earth objects since the 1970s, efforts to catalogue potentially ...

A 9th planet in our solar system might be found — and no, it’s not Pluto - Is there another planet out there? Researchers say ...

Caroline Delbert is a writer, avid reader, and contributing editor at Pop Mech. She's also an enthusiast of just about ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

The presence of another planet in the solar system could explain the odd movements of some of the bodies in the Kuiper Belt.

Astronomers have detected a promising sign of a ninth planet lurking at the the farthest reaches of the Solar System.

The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

Kosmos 482 has been orbiting the Earth for decades. It's still unknown if the craft will fall to Earth intact or burn up upon ...

This strange exoplanet, located 140 light-years away from Earth in the constellation Pegasus, appears to be rapidly falling ...

Championing sustainability by promoting nature nonprofits, increasing recyclability and reducing waste and emissions.

Revenge of the Savage Planet takes aim at corporate incompetence in a satirical slice of sci-fi slapstick, even if it plays its open-world formula safe.