This theory caused Pluto to be demoted to a dwarf planet. What might there be at the edge of the universe?
Answer Planet Nine
Two astronomers from the California Institute of Technology discovered via math and simulations that there may be a ninth planet in our solar system, lying far beyond Neptune. "Planet Nine," as Konstantin Batygin and Mike Brown deemed their theory, is based on the movements of some large objects in the Kuiper Belt which could be being pulled by this giant out-of-reach planet.
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