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

This is probably the most convincing evidence for Planet Nine so far. It is believed that this planet is five to ten times ...

Researchers have found a candidate for the hypothetical Planet Nine, which could be an undiscovered giant planet way out in ...

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

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

Using two infrared space telescopes and a 23-year gap, scientists may have spotted a mysterious, slow-moving object beyond ...

Astronomers may have uncovered a potential candidate for the elusive Planet Nine, a hypothetical planet located far beyond ...

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

A team of astronomers poring through old astronomical data may have seen a candidate for the elusive Planet Nine – a ...

With its beautiful rings, Saturn may be the most stunning planet in the solar system. It is the sixth planet from the sun and ...

An international team including astronomers from the Center for Astrophysics | Harvard & Smithsonian (CfA) has announced the ...