Seeds, Michael A. Horizons : exploring the universe / Michael A. Seeds. - 5th ed. - Calif. : Wadsworth Pub, c1998. - xv, 459 pages Glossary : p. 437 - 447. Includes bibliographical references and index. ISBN: 0534524346 Subjects--Topical Terms: Astronomy. LC Class. No.: QB45 / Se3 1998