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

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, ...

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

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

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

but it means it’s not Planet 9,” Brown said. “I don’t think this planet would have any of the effects on the solar system that we think we’re seeing.” Brown’s discovery of Eris ...

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.

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 ...

Over the past decade or so, astronomers have speculated about the characteristics of rogue planets in the Milky ... they may have in common with solar system worlds. A recent paper has focused ...