Traces the history of modern astronomy and examines some of its important concepts.

Describes a variety of energy sources for the future, including wind power, solar energy and biopower.

Examines different forms of energy and their uses in powering various human activities.

"Examines the history of theories about the basic building block of the physical universe."--Source other than the Library of Congress.

Copernicus worked with primitive scientific instruments to prove that Earth revolved around the sun. The idea of Earth circling the sun is universally accepted