Mercury.
Mercury is the smallest planet in the Solar System and the closest to the Sun. Its orbit around the Sun takes 87.97 Earth days, the shortest of all the Sun's planets.
Orbital period: 88 days
Distance from Sun: 35.98 million mi
Surface area: 28.88 million mi²
Length of day: 58d 15h 30m
Radius: 1,516 mi
Mass: 3.285 × 10^23 kg (0.055 M⊕)
Gravity: 3.7 m/s²
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