Part 3/10:
Despite its dense makeup, Mercury is relatively small. Its surface gravity is about 3.7 m/s², roughly 38% of Earth's gravity, slightly more than that on Mars. To contextualize its size, compare Mercury with some of the moons—Ganymede, the largest moon in the solar system, and Titan, Saturn's prominent satellite. Both moons surpass Mercury in terms of diameter but are less dense, with Mercury’s greater density highlighting its rocky, metallic nature.
Surface Features and Geological History
Mercury’s surface resembles that of our Moon, featuring extensive plains similar to lunar "seas," filled with craters and scarred by billions of years of impacts. Yet, the planet’s geologically inactive status for eons suggests these features are ancient and well-preserved.