Gregory Vogt

Describes the planet Jupiter and its surface features, atmosphere, rotation and orbit, moons, and more.

Discusses the orbit, atmosphere, rings, moons, surface features, exploration, and other aspects of the planet Saturn.

Discusses the rotation, interior, surface features, atmosphere, and exploration of the Sun, including solar wind and the Sun's place in the solar system.

An interesting explanation of a spacecraft, its parts, and how they function. Describes the pre-flight, launching, flight, and landing. Includes a chronological list of flights.

Explores how stars form and create energy, including descriptions of black holes, constellations, and the movement of stars.

Examines the devastating effects of forest fires and the various techniques used to combat and prevent them.

Describes the formation, exploration, and parts of a comet, including how people have perceived comets throughout history.

Text and photographs present information on Mars, the reddish orange planet, and its exploration by the United States spacecraft, Mariner and Viking.

Describes the objects that reside in the Milky Way galaxy, including stars, nebulas, clusters, and black holes, and explains what astronomers have discovered about other galaxies.

Discusses the United States space program Viking and the mission to Mars.