Astronomers have long speculated about a hidden planet—Planet Nine—lurking beyond Neptune. First proposed in 2016, the theory explains the strange orbits of distant Kuiper Belt objects through the gravitational pull of a massive, unseen world. Caltech researchers remain confident, while others suggest alternatives like debris rings or even a black hole. Recent discoveries such as 2023 KQ14 deepen the mystery. Despite limited data, the search continues with advanced telescopes, pushing the boundaries of our knowledge of the solar system’s remote edges.
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