Facts about Mercury
- Mercury is the closest planet to the Sun
- Smallest planet in Solar System
- Orbits between the Sun and Venus
- No known moons
- Most dense planet
Almost nothing was known about Mercury until 1974 and 1975, when the Mariner 10 went to Mercury. Latest mission to Mercury was in August of 2004. It's surface is dry and rocky. Also they're are many craters covering the surface. Caloris, one of many impact basins, measures 960 miles across, and the mountains on the sides are nearly 2 miles high. Mercury also has three main layers, a core, mantle and a thin crust on the outside. It takes 59 earth days to rotate once on its axis, and 88 days to revolve around the Sun. The average distance between Mercury and the Sun is 29 million miles. Mercury is mostly made of iron. The temperature is 801 degrees Fahrenheit. It is the first planet from the Sun.
What Is Mercury?
Planet Song for Kids/Solar System Songs for Children/Mercury Song for Children