Scientists have fiercely debated the existence of ‘Planet 9’ for a decade. Some say evidence is piling up
After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...
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Scientists have fiercely debated the existence of ‘Planet 9’ for a decade. Some say evidence is piling up
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