Evidence is stacking up against the possibility of a Planet 9 beyond Neptune
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The evidence for a mysterious planet at our solar system’s edge has become less convincing. The existence of this unseen world was inferred from unexpected clustering of objects that orbit the sun beyond Neptune, but new simulations suggest that clustering is not happening.
In 2016, Mike Brown and Konstantin Batygin at the California Institute of Technology suggested that six objects in the outer solar system called trans-Neptunian objects (TNOs) which have similar orbits may have been put on their paths because of the …