Comet halley has an orbital period of about 75 yearsa, Ask an Expert

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Comet Halley has an orbital period of about 75 years.

(a) Determine the average distance of Comet Halley from the sun in AU.

(b) Sometimes, Comet Halley can be found just about past the orbit of Neptune, which is (on average) about 30 AU from the sun. Explain how this is possible given the average distance you found from its orbital period.

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