Mercury, the cratered planet closest to our Sun, is a planet of extremes. It is the solar system's smallest planet, and it experiences extraordinary swings in temperature. Readers will learn these facts and many, many more. Sidebars and beautiful illustrations help keep the reader engaged.

Learn basic facts about the planet Mercury and its place in the solar system.

Presents facts about Mercury and Venus and describes what it would be like to visit there.

Simple text and photos introduce young readers to the planet Mercury.

Learn about our solar system's smallest planet--Mercury--and its extreme temperatures, mysterious craters, and other unique features.

Provides an introduction to the planet Mercury, including what gave Mercury wrinkles and why the planet has almost no atmosphere.

Describes the orbit, rotation, temperature, and surface formations of the planet Mercury and the probe Mariner X that took pictures of it in 1974 and 1975.

Describes the planet closest to the sun and how our knowledge of this world has expanded since 1974 through the use of unmanned spacecraft.

Describes the discovery and observation of the planet nearest the sun, Mercury, including the findings of the Mariner 10 fly-by mission of 1974-75.