What are some facts about Mercury?

Mercury, the innermost planet of the solar system, is a little bigger than the Earth’s Moon. Mercury is the smallest of all the planets in our solar system. It’s just 4,880 kilometers in diameter. The diameter of Earth is almost three times Mercury’s at 12,700 kilometers. And the largest planet of our solar system – Jupiter – is huge by comparison at 143,000 kilometers. That’s almost thirty times the diameter of Mercury. The surface of the planet is covered with craters, like the Moon, but temperatures there can reach over 800°F because Mercury is so close to the Sun and rotates so slowly.  As Mercury is so close to the sun, its orbit is fairly fast. It takes only 88 days for it to orbit the sun – so one Earth year is four years on Mercury. Mercury orbits at a high speed. It moves at 47 kilometers per second. Temperatures on Mercury can reach up to 427 degrees Celsius.

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