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

Most astronomers agree that life is likely common throughout the universe. While Earth is the only world known to have life, ...

“Whether it is real or not, it is 100 percent NOT Planet Nine,” Brown says. “Planet Nine is a prediction based on inferred ...

"Rings are mostly made of ice and small rocks," said William Saunders, a planetary scientist at NASA's Langley Research ...

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

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

An alternate explanation that fits the evidence is that Vesta was once part of a planet – but which planet that might been ...

Astronomers may have found a candidate for Planet Nine. This planet is beyond Neptune. The finding could be the first ...

Researchers say they found a curious dot on infrared images taken 23 years apart that seems to be moving in a manner ...

Their research provided evidence for a planet about 1.5 times the size of Earth in the outer solar system, but did not actually find a candidate planet. Responding to the latest study, Brown told ...