00600nam a22001457a 450000500170000000800410001702000180005804000100007610000230008624500350010926000340014430000140017852002530019252600090044520210630065959.0210630b           ||||| |||| 00| 0 eng d  a9780531168967  cGSLRC  aTrammel, Howard K.  aGalaxies /cHoward K. Trammel.  aNew York :bScholastic,c2010  a48 pages.  aGreg 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.  c900L