Mercury:
Mercury:. Mean Distance from Sun. 57,909,175 km (35,983.1 miles) or 0.387 astronomical units. Diameter. 4,879.4 km (3,031.92 miles). Volume (Earth = 1). 0.054. Mass. 3.3 x 10 23 kg (0.012 x 10 27 ounces) or 0.055 (Earth = 1). Density. 5.43 gm/cm 3. Surface gravity. 0.376 (Earth = 1).
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