10 Astounding But True Facts About the Planet Mercury


An Eccentric Orbit

Mercury is the planet with the most unusual orbit in the solar system. What is an eccentric orbit, you ask? The eccentricity of an astronomical object is a parameter that defines the measure by which its orbit about another body diverges from a perfect circle.

Interestingly, its eccentricity is not all that remarkable contrasted to those of dwarf planets and some recognized extra-solar planets. Pluto, for instance, has a larger eccentric orbit than Mercury, but it’s not recognized as a “real” planet anymore.

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