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An icy, unknown world might lurk in the distant reaches of our solar system beyond the orbit of Pluto, according to a new computer model.
The hidden world — thought to be much bigger than Pluto based on the model — could explain unusual features of the Kuiper Belt, the region of space beyond Neptune littered with icy and rocky bodies.
Sedna takes 12,000 years to travel once around the Sun, and its orbit ranges from 80 to 100 astronomical units (AU). One AU is equal to the distance between the Earth and the Sun.
According to the model, Sedna and other Kuiper Belt oddities could be explained by a world 30 to 70 percent as massive as Earth orbiting between 100 AU and 200 AU from the sun.
Sedna takes 12,000 years to travel once around the Sun, and its orbit ranges from 80 to 100 astronomical units (AU).
If the orbit of this 'new' plutoid is double that of sedna it would have to be so much larger than 30-70% of earth to effect the gravity of Sedna etc.. Also, how long would that orbit take?