How can Mercury be both scorching and freezing?Mercury races around the Sun faster than any other planet, yet one sunrise to the next takes an astonishingly long time. Sunlit ground becomes fiercely hot while shadowed polar craters can stay cold enough to protect water ice.Cross an airless landscape of giant impact basins, volcanic plains, mysterious hollows, and enormous cliffs formed as the planet cooled and shrank. Look inside Mercury's oversized iron core. Follow atoms through its fragile exosphere, trace its surprising magnetic field, and meet the spacecraft that transformed a cratered dot into a complex world.Young readers will discover: For families comparing planet books, MERCURY offers a complete visual expedition filled with motion, metal, ice, and surprises for curious readers ages 5 to 12.
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