Designed to be used as a graduate student textbook and a ready reference for the busy professional, Orbital Mechanics, Second Edition is structured so that you can easily look up the things you need to know. Included in the second edition are two added chapters on Orbital Coverage and on Optimal Low-Thrust Orbit Transfers, updates on several chapters, and basic PC-compatible software, which can be used to solve selected problems in the text. The well-organized chapters cover every basic aspect of orbital mechanics, from celestial relationships to the problems of space debris.