Do the planets move the same speed?



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    No, the speed at which all objects move in space depends upon not only their size, but also their distance from other objects and the gravity they affect one another with. The closer an object is to another, say a planet to a sun, the faster it revolved around it because the more gravity it is experiencing. Mercury, the closest planet to the sun, usually moves around 30 miles a second, where as Pluto and Neptune move only about 2.5 miles per second due to their being bereft of much of Earth’s gravitational forces.

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