"Award-winning amateur astronomer and writer Stephen James O'Meara has written the definitive guide to the Caldwell Catalogue. With its detailed sketches, photographs, and star charts, Deep-Sky Companions: The Caldwell Objects will show you how to locate and get the most out of observing each of the 109 Caldwell gems. But it is much more than a field guide: O'Meara weaves history, mythology, and cutting-edge astrophysics (including many Hubble Space Telescope discoveries) into his entertaining and captivating accounts."--BOOK JACKET.