Which planet is smallest in size in solar system ?

Mercury

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Venus

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Mars

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Saturn

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Solution

The correct option is A Mercury
The smallest planet in the Solar System is Mercury. For the longest time, the smallest planet was considered to be Pluto, but now Pluto isn't a planet anymore, so we're back to Mercury. Mercury measures 4879 km along its equator. Just for comparison, Earth is 12,742 km across.

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Arrange according to size from smallest to biggest in our Solar System - planets, meteoroids, Sun.

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