Turn Left at Orion is a guidebook for beginning amateur astronomers. The Moon, planets and nearly a hundred deep sky objects, visible in the Northern hemisphere, are shown exactly as they appear in a small telescope (50–75 mm, or 2–3 inches aperture). The book provides all the information you need to find these, and other objects, in the night sky. There are plenty of maps to get you located, and the large format drawings accurately depict what you can expect to see. For each object there is information on the current state of our astronomical knowledge. Unlike many guides to the night sky, this one is specifically written for observers using small telescopes. No previous knowledge of astronomy is needed, and since the descriptions are non-technical, sky-watchers of all ages and backgrounds can enjoy and profit from this book. In the revised edition of this successful book, first published in 1989, the authors have brought information on the planets and eclipses up to date and extended the tables to the year AD 2006.