Astronomers Propose Existence of Earth-Sized Planet Beyond Neptune

  • The unusual movement of trans-Neptunian objects (TNOs) may be due to an Earth-like planet, not ‘Planet Nine’, argue scientists.
  • This hypothetical Earth-sized planet could be at 250-500 astronomical units from the Sun, closer than Planet Nine’s estimated location.
  • The proposed existence of this new planet could explain the peculiar orbits of certain objects, like dwarf planet Sedna.
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