Mercury is the first planet from the Sun and the smallest in the Solar System. It is a rocky planet with a trace atmosphere and a surface gravity slightly higher than that of Mars.
Fun Facts
Diameter: 4879 km
Gravity: 3.7 m/s
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Escape Velocity: 4.3 km/s
Length of day: 4222.6 hours
Length of orbit: 88 days (earth days)
Average distance from Sun: 57.9 million km
Mercury has 0 moons