Researchers have found more evidence that there is an unknown planet in our solar system. Astronomers have been searching for proof that Planet Nine — also known as Planet X — exists for years ...

If true, it would constitute the ninth planet in our solar system, an honor once bestowed on Pluto, which has since been demoted to dwarf-planet status. They’ve nicknamed the new object Planet Nine.

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory about the possibility of a giant ninth planet. The dwarf planet's existence ...

A11pI3Z is only the third interstellar visitor to be discovered, and astronomers can’t say yet whether it is a comet or a ...

Scientists say they have found evidence of an unknown planet in our solar system. New findings represent the ‘strongest statistical evidence yet’ that Planet 9 exists, researcher says .

Did you know our solar system might have had an extra planet? ... sending it drifting into the unknown. If this planet is still out there, it could be wandering somewhere far beyond our reach.

Planet might not be the result of unknown objects but unusual gravitational dynamics, researchers say . ... 'Hidden' Planet In Our Solar System Could Be Five Times The Size Of Earth.

A newly found object may set a new record for the most distant dwarf planet in the solar system.. The object, called V774104, lies about nine and a half billion miles from the sun, or two to three ...

(CNN) — Astronomers have discovered three previously unknown moons around Uranus and Neptune, the most distant planets in our solar system. The find includes one moon spotted orbiting Uranus ...

A research team has confirmed evidence of a previously unknown planet outside of our solar system, and they used machine learning tools to detect it. A recent study by the team showed that machine ...

Scientists say they have found new evidence that there is a hidden planet in our solar system. For years, some astronomers have been suggesting that unusual behaviour on the edge of our solar ...

Astronomers have been searching for evidence that Planet Nine exists for years Tobias Roetsch/Future Publishing via Getty Artist rendering of the proposed Planet Nine. Researchers have found more ...