Written in clear, easy-to-read language, Astronomy and Space Exploration lists
more than 50 of the most important and intriguing astronomical and space-
related sites in the United States. The book encompasses both popular and
obscure places of…
A Fascinating March through History and the Evolution of the Modern-Day Calendar . . .In this vivid, fast-moving narrative, you'll discover the surprising story of how our modern calendar came about and how it has changed dramatically through the…
Astronomer Duncan Steel provides the most up-to-date and comprehensive introduction to the serious science behind these predictions. Steel is a world authority on the comet hazard and member of the NASA team set up to study the problem. Here he…