Suppose a planet lies at a distance of 3 AU from its star when it is at perihelion. Suppose also that its aphelion distance is 2 AU. If its orbital speed at perihelion is 30 km/s, what is it at aphelion?

Suppose a planet lies at a distance of 3 AU from its star when it is at perihelion. Suppose also that its aphelion distance is 2 AU. If its orbital speed at perihelion is 30 km/s, what is it at aphelion?

Astronomy

1st Edition

ISBN:9781938168284

Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Chapter21: The Birth Of Stars And The Discovery Of Planets Outside The Solar System

Section: Chapter Questions

Problem 24E: Kepler’s third law says that the orbital period (in years) is proportional to the square root of the...

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Suppose a planet lies at a distance of 3 AU from its star when it is at perihelion. Suppose also that its aphelion distance is
2 AU. If its orbital speed at perihelion is 30 km/s, what is it at aphelion?

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