"For a few years now, astronomers have been detecting hints that there may be a mysterious planet lurking undetected in some of the farthest reaches of our solar system.
But a new study suggests there may be a great deal more going on in the cold, dark regions of space beyond the eighth planet orbiting our sun, Neptune.
Scientists have discovered a bizarre new object, less than 124 miles (200km) across, with a strange tilted orbit that sends it high above the flat orbital disk of the rest of the solar system.
They found the new minor planet, which they have named Niku after the Chinese for rebellious, which seems to be part of a cluster of other similar objects and icy planetoids with similar orbits.
It suggests they may have been pushed or pulled into this strange orbit by something far larger orbiting beyond Neptune.
At first the astronomers thought it could be the hypothetical Planet Nine that astronomers have been hunting for far beyond Pluto on the farthest edge of the solar system.
However, they found Niku and its fellow tiny worlds are too close to the rest of the solar system to have been tugged out of place by this theoretical planet.
Instead, they suggest Niku and its neighbours may have been swept into their strange orbit by another undiscovered dwarf planet like Pluto or Ceres."
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