Mercury’s Anomalous Composition

Images of Mercury reveal an unusual blend of mineral compounds in its surface structure, as well as a thin atmosphere.

The planet Mercury is 4878 kilometers in diameter. The moons Ganymede and Titan are both larger, while Earth’s moon is slightly smaller. Mercury orbits the Sun at a mean distance of 57,910,000 kilometers—a year on Mercury lasts a mere 88 days. Since Mercury rotates every 58.6 days, the planet completes three rotations for every two orbits about the Sun. Close proximity to its primary means that temperatures on Mercury can reach 427 Celsius when the Sun is at its zenith.

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"What lies behind us and what lies before us are small matters compared to what lies within us."  ~ Ralph Waldo Emerson ~