Describes the planet Mercury which is closest to the sun and is made up of cliffs and cracks and its temperature goes up and down from extreme heat to extreme cold. It has a very thin atmosphere and a heavy core of iron inside.
General Note
Includes index.
Content Note
Where is Mercury? -- On the way -- What's the surface like? -- A day on Mercury -- Atmosphere and climate -- What's inside Mercury? -- How Mercury formed -- Mercury myths -- Observations from Earth -- Hidden planet? -- Mercury probes -- Could humans live there?.