If a Tenth Planet (Tentatively Predicted to Exist on the Basis

question 241

Multiple Choice

If a tenth planet (tentatively predicted to exist on the basis of perturbations in the orbits of Uranus and Neptune) were to be discovered with a sidereal period of 125 years,what would be the radius of its orbit (assumed to be circular) ?

• A) 8.55 AU
• B) 125 AU
• C) 1 AU
• D) 25 AU

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