The definitive guide to the universe, from the Solar System to the farthest limits of space, for the whole family is now available in paperback. Martin J. Rees, well-known cosmologist, is the author of Just Six Numbers: The Deep Forces that Shape the Universe (2001, pb) and Our Final Hour: A scientist"s warning: How terror, error, and environmental disaster threaten humankind"s future in this century (2004, pb), as well as other books for the trade and academic audiences.