Mercury Planet Radius. Mercury is the innermost and smallest planet in the solar system, orbiting the sun once every 88 days. Of the four terrestrial planets, it has proved the most difficult planet to observe and explore. Its orbit around the sun takes 87.97 days, the shortest of all the planets in the solar system.
Mercury mercury is the innermost and second smallest planet (4,878 kilometers 3,024 miles in some idea of mercury's internal structure can be gained from the knowledge of its mass and radius.
With a radius of about 2,440 km (1,516 miles), mercury is the smallest major planet, smaller even. Mercury is bright when it is visible from earth, ranging from −2.0 to 5.5 in apparent magnitude. Your weight on mercury would be 38% of your weight on. Its radius is a mere 2,439.7 km. This planet also prompts us to move from one thing to the next and to. If the earth were the size of a nickel, according to nasa, mercury would be the size of a. It is so small that the moons of other planets such as ganymede and titan are larger than mercury. Historical observations of its orbit around the sun have contributed to a new understanding of physics.
