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 ...

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 ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

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.

The Vera C. Rubin Observatory is expected to find millions of unknown objects in our solar system, and perhaps even a ...

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 ...

(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 ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, researchers say. ABC News. Video. Live. Shows. Shop. Log In. Stream on.

Currently, our solar system recognizes 8 planets, with Pluto being demoted to a dwarf planet floating in the Kuiper Belt in 2006. Planet Nine's gravitational pull may explain what keeps the icy ...

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 ...

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 ...