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Planet Nine just got harder to believe in

8 September 2026
Planet Nine just got harder to believe in
Future Technology

New article published

Astronomy

Planet Nine just got harder to believe in

For about a decade, a handful of astronomers have argued that the unusual clustering of distant Kuiper Belt objects points to an undiscovered giant planet shepherding them into alignment. The proposed object, Planet Nine, would be roughly five to ten times Earth's mass and orbit at enormous distance, taking perhaps 10,000 to 20,000 years to complete one lap of the Sun.

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