Is there a hidden planet lurking at the edge of our solar system? Scientists believe Planet Nine—a massive, frozen world twice the size of Earth—may be orbiting in the distant darkness beyond Neptune. This isn't science fiction. It's a mathematical certainty supported by strange gravitational patterns in the outer solar system that can't be explained any other way. In this video, we explore the centuries-long quest to find invisible planets, from the accidental discovery of Uranus to the mathematical prediction of Neptune. We dive into the compelling evidence for Planet Nine: the mysterious clustering of distant Kuiper Belt objects, computer simulations showing 99.6% probability of its existence, and the profound questions it raises about what else might be hiding in the cosmic darkness. Source: https://www.astronomy.com/science/doe... https://science.nasa.gov/solar-system... https://en.wikipedia.org/wiki/Planet_... https://www.skyatnightmagazine.com/ne... https://www.caltech.edu/about/news/ca... #PlanetNine #SolarSystem #SpaceDiscovery #Astronomy #CosmicMystery