Trammel, Howard K. <br/><br/>
Galaxies / 
Howard K. Trammel. 
 - New York :  Scholastic,  2010 
 - 48 pages. 
<br/><br/> 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. 
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<br/><br/><label>ISBN: </label>9780531168967 9780531228036