TY - BOOK AU - Trammel, Howard K. TI - Galaxies SN - 9780531168967 PY - 2010/// CY - New York PB - Scholastic N1 - 900L N2 - Greg Bothun offers information about galaxies, as part of the Electronic Universe resource. Bothun notes that galaxies are diffuse images which must be detected against a background of finite brightness with noise and explains low surface galaxies ER -