The Concise Knowledge Astronomy, published in 1898, was one of a series of popular reference books by experts. Agnes Clerke (1842 1907) was a successful author of books on astronomy and its history (three of her other works being reissued in this series), and her co-authors were astrophysicist Alfred Fowler, an internationally renowned expert in spectroscopy, and J. Elland Gore, a Fellow of the Royal Astronomical Society and expert on variable stars. Illustrated by over 100 photographs and drawings, the book aims to provide the educated non-specialist reader with an understanding of current...