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Mercury is the closest planet to the Sun and the smallest planet in the solar system. It has extreme temperatures, a thin atmosphere, and a heavily cratered surface, resembling Earth's Moon.
Basic Characteristics
Basic Characteristics
- Size & Mass:
- Diameter: 4,880 km (3,032 miles) (smallest planet in the solar system).
- Mass: 0.055 Earth masses (very low gravity).
- Atmosphere:
- Almost nonexistent, just a thin layer of oxygen, sodium, hydrogen, and helium.
- Cannot retain heat, leading to extreme temperature differences
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