Mercury is the innermost and smallest planet in the Solar
System, orbiting the Sun once every 87.969 Earth days.
Mercury is similar in appearance to the Moon:
it is heavily cratered with regions of smooth plains, has no
natural satellites and no substantial atmosphere.
Diameter: 4,878km
Orbit: 57,910,000 km from Sun.
Average Distance: About 58 million km
Period of Rotation: 58.6462 days
Moons: 0
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