Mercury's distance away from the sun varies from 29 million miles to 43 million miles. This is due to Mercury's elliptical orbit. For example, on its closest approach, Mercury is 29 million miles away from the sun.
Mercury is the planet that is nearest to the sun. It also is the smallest planet of the eight planets in the solar system. This planet has no moons and no atmosphere. Likewise, its surface has many craters. The day time temperature can reach as high as 700 Fahrenheit degrees and the night time temperature can go down to about -300 F. Because of Mercury's slow rotation, a day on Mercury is equivalent to 58.5 Earth days.