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Planet X might be hiding much closer than we think
For decades, astronomers have searched for the mysterious Planet X. This documentary explores the evidence behind the theory, ...
Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Is there an unseen planet — a "planet X" or "Planet Nine" — ...
A mysterious object known as Planet X is once again at the center of a terrifying question: could something hidden in deep ...
Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the discovery of Pluto in the 1930s. Labeled as planet X, prominent astronomers ...
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