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

The candidate is a dot with the same colors and brightness across the two sets of ... The existence of Planet Nine — or any ...

A ninth planet the size of Neptune may be hidden in the far reaches of the solar system, but the evidence has left some experts skeptical.

Almost 10 years ago, a NASA spacecraft was able to take several photos of Pluto, known for decades as a planet before it was ...

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

Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn more about our cosmic home. The solar system is our cosmic neighborhood, made up of ...

One set of dots had matching colors and brightness ... there is solid evidence that the solar system's planetary census is incomplete." No observational evidence for Planet Nine has been found ...