Closest planet to the Sun
Mercury is the closest planet to the Sun. It is small, rocky, and covered with many impact marks from long ago.
Mercury is the smallest major planet and the closest one to the Sun.
A small rocky brown world with sunlight glowing along one side.
Mercury is the smallest major planet and the closest one to the Sun.
Mercury has a hard rocky surface with many craters. It has almost no thick atmosphere, so conditions at the surface can change sharply between strong sunlight and deep darkness.
Mercury helps readers understand the inner Solar System. It shows what a small rocky planet can be like when it circles close to a star.
Mercury moves quickly around the Sun, but it spins slowly. That makes its pattern of sunlight and darkness very different from the pattern on Earth.
Think of a small dark-gray world near a blazing star, with a rough surface and strong sunlight across one bright edge.
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