The Practical Astronomer's Deep-Sky Companion

An essential item of equipment for all deep-sky observers. Designed to be taken out into the field during observing sessions, it provides essential detailed, co... » 

An essential item of equipment for all deep-sky observers. Designed to be taken out into the field during observing sessions, it provides essential detailed, concentrated infromation for finding, observing and imaging the most interesting deep-sky objects. It is organised by constellation; each spread features images, information, position, locator maps, and more. «