A possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 ...

There’s a new object in the distant reaches of our solar system, and it might just offer clues to a long-standing cosmic ...

For the unversed, "Planet Nine" is a hypothetical planet which is reportedly larger than Earth that is thought to orbit ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system ...

Astronomers have been left puzzled by the discovery of an unusually large planet orbiting a remarkably small star, a cosmic ...

Scientists have discovered a colossal object approximately 435 miles wide in the frigid outer reaches of our solar system, ...

Jupiter, roughly 562 million miles from Earth today, has nearly 100 moons. But Batygin and his collaborator Fred Adams' ...

But this assumes that nothing affects the Solar System in the meantime, and that is not a certainty. As we travel around the ...

There’s a new frozen oddball orbiting the Sun, and it’s not your average space rock. It’s a planet—a minor one, to be ...

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond ...