Astronomical Adventures

The Planet Mercury

Planet Mercury

Mercury as seen by Mariner 10

Some basic facts about Mercury

Radius (kilometers)2439
Orbital Distance from the Sun (kilometers)57909141
Rotation Period (1=24 hours)58.646
Mass (Million Metric Tons)3.302E+11
Density (grams/cubic centimeter)5.43
Year DiscoveredUnknown

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