Transcription: Mercury is the closest planet to the Sun and as you can see in this side-by-side comparison, it's a rather small planet being only 38% the size of the Earth. It has been visited by only one spacecraft, Mariner 10, and that spacecraft was only able to image about 45% of the planet because its proximity to the Sun makes it very dangerous to image. Its orbit is rather elliptical. At perihelion, it is only about 46 million kilometers from the Sun. sun, but at Aphelion it is nearly 70 million kilometers away from the sun. Like Earth, it rotates on its axis, but the rotation is slow. Mercury makes o ...
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