Mercury : The moons of Mercury, are there any?
Mercury is the smallest and innermost planet in the Solar System. Its orbital period around the Sun of 88 days is the shortest of all the planets in the Solar System. It is named after the Roman deity Mercury, the messenger to the gods.
Radius: 2,440 kmDistance from Sun: 57.91 million kmMass: 3.285 × 10^23 kg (0.055 M⊕)Length of Day: 58d 15h 30mOrbitPeriod: 88 daysGravity: 3.7 m/s²
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