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The four inner, rocky planets are also known as the terrestrial planets. These are; Mercury, Venus, Earth and Mars. These have much smaller diameters than the outer gas giant planets. The smallest is Mercury, with a diameter of 4879km or 3032 miles.

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Which planet has a diameter of 22km?

That's very small for a planet!Planets have diameters measured in thousands of kilometers. I think you may have used the wrong number.


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Diameters of planets, planetoids, or moons are often expressed in kilometers.Diameters of planets, planetoids, or moons are often expressed in kilometers.Diameters of planets, planetoids, or moons are often expressed in kilometers.Diameters of planets, planetoids, or moons are often expressed in kilometers.


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