AU If the comet last came closes
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Kepler's third law states that the planets' orbital periods' square is directly proportional to the semi-major axes' cubes and their orbits. It also states that a planet's period to orbit the sun increases rapidly with its orbit's radius. Short-period comets are the ones having an orbital period of fewer than 200 years. It is also known as the periodic comet.
Step 2
- The third law of Kepler relates the orbital period T in years to the semi-major axis distance in AU using the equation . If T=78 years then R=18.26AU
- Given,
The comet last came closest to the sun in 1982.
We know that short period comets take 200 years or less to complete one orbit, and long-period comets take more than 200 years.
As the given comet is a short-period comet, the time it takes to reach the sun's furthest point is around 1982+200=2182.
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