Mercury is the smallest planet in our solar system and only slightly larger than Earth's Moon. It orbits the Sun at an average distance of 36 million miles and completes one rotation every 59 Earth days.

Mercury is the smallest planet in the Solar System, with a mean radius of 2,439.7 km and a volume of 6.083×1010 km3. It has a dense iron-rich core, a thin silicate crust, and a tenuous atmosphere of sodium and potassium.

Mercury is the smallest planet in the solar system, with a diameter of 3,030 miles (4,878 km) and a density of 5.427 grams per cubic centimeter. Learn how Mercury is shrinking, why it has no atmosphere, and what features it has on its surface.

Learn about Mercury, the smallest planet in the solar system, with a diameter of 3,032 miles (4,880 km). Find out how far it is from the Sun, how long it takes to orbit, and what its surface and atmosphere are like.

Learn about Mercury, the smallest and closest planet to the Sun, with no moons or rings. Compare its diameter, mass, orbit, temperature and other features with Earth and see diagrams and images.

Mercury is the smallest planet in our solar system, with a diameter of about 3,032 miles (4,880 km). Learn more about its name, temperature, composition, retrograde, potential for life and more.

Mercury is only slightly larger than Earth's Moon and has a solid, cratered surface. Learn more about its features, exploration, and facts from NASA's website.

Mercury is the smallest planet in the solar system, measuring just 3,032 miles wide at its equator. Learn more about its orbit, surface, history, and missions in this article.

Mercury is the smallest and second densest planet in the Solar System, with a radius of 2.439 km and a diameter of 4.879 km. It orbits the Sun at an average distance of 0.4 AU, and completes one rotation every 59 Earth days.