This volume is produced from digital images created through the University of Michigan University Library's preservation reformatting program.

Calibrating the Cosmos describes hard science, but is gently written. It explains in clear, non-mathematical language the measurements and the interpretation of the resulting data that have led to the current understanding of the origin, evolution and properties of our expanding Big Bang universe.

Stephen Hawking's worldwide bestseller, A Brief History of Time, has been a landmark volume in scientific writing. Its author's engaging voice is one reason, and the compelling subjects he addresses is another: the nature of space and time, the role of God in creation, the history and future of the universe. But it is also true that in the years since its publication, readers have repeatedly told Professor Hawking of their great difficulty in understanding some of the book's most important concepts.

Twenty six far-reaching discoveries and the twenty nine scientists who made them-from Archimedes, who boasted he could move the world, to Goddard, who sent the first liquid-fuel rocket toward space. These men of vision and genius set their sights beyond the known to bring about bold advances in scientific thinking and enlarge our knowledge of man and his environment. By Asimov from almost 50 years ago.