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Q:

Do planets orbit fast or slow?

A:

They move pretty quickly! The planets all orbit at different speeds. The closer a planet is to the Sun, the faster the planet orbits. Mercury is the fastest planet, moving at 47.87 km/s while Neptune orbits at 5.43 km/s. For reference, a bullet travels at roughly 1 km/s out of a rifle. 

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Categories: Propulsion