Intended as a junior level text in solar energy, the following topics are discussed in detail: (1) the solar constant; (2) solar astronomy; (3) insolation; (4) heat transfer; (5) solar collectors; (6) solar heating panels; (7) solar heating systems; (8) thermodynamic conversion of solar energy to work; and (9) photovoltaics. Problems are provided at the end of each chapter and numerous references are cited. (MJJ)