TY - BOOK ED - World Book, Inc TI - Quasars and black holes T2 - Explore the universe SN - 9780716695523 U1 - 523.8 21 PY - 2010/// CY - Chicago, IL PB - World Book KW - Black holes KW - Juvenile literature KW - Quasars N1 - Includes index N2 - An introduction to quasars and black holes with information about their formation and characteristics. Includes diagrams, fun facts, a glossary, a resource list, and an index"--Provided by publisher ER -