Trammel, Howard K.
Galaxies / Howard K. Trammel. - New York : Scholastic, 2010 - 48 pages.
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.
9780531168967
Galaxies / Howard K. Trammel. - New York : Scholastic, 2010 - 48 pages.
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.
9780531168967