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According to Kepler, which planet travels the fastest?

Earth
Jupiter
Mercury
Neptune

2 Answers

2 votes

The answer is "Mercury".

User Jan Laussmann
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4 votes

Answer: Mercury

Step-by-step explanation:

According to second Kepler's law of planetary motion:

The line joining the planet and the sun sweeps equal areas in equal amount of time. This describes the speed of the planet.

In order to conserve momentum, the planet closest to Sun would travel fastest and planet farthest from Sun would travel slowest.

Since Mercury is the closest planet to sun, it would be fastest.

User Sumerz
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