An impressive compendium of thousands of years of astronomy--from Babylon to Copernicus. In tracing the history of star-gazing, Evans traces the history of science, showing how ideas arose, migrated, stood up or failed under testing, and were passed down through the centuries. One learns a deep respect for ancient astronomers. Almost 2,000 years before Columbus, Greek scientists had figured out that the world was round, and had even determined that the Earth was miniscule compared to the size of the universe. Evans is committed to the idea of learning by doing, so he gives detailed instructions on how to construct every instrument that ancient astronomers used--from sundials to astrolabes. The book is full of great science projects. I would strongly recommend this book for those interested in the history of science, ancient and medieval thought, backyard astronomy... even astrologers would benefit greatly from this book.