This comprehensive treatise on astronomy is divided into two parts: theoretical concepts and practical problems. Part one offers a clear and concise overview of astronomical theories while part two includes numerous practical problems along with solar, lunar, and other astronomical tables. Ideal for students of astronomy or anyone interested in learning more about the night sky. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.