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Shane-Wirtanen catalog
subjectfact 
Shane-Wirtanen cataloghas definition A catalog of all galaxies brighter than seventeenth magnitude (a measure of brightness). There are about a million galaxies in the Shane-Wirtanen catalogue.has source: Lightman, A., Brawer, R. 1990 The Lives and Worlds of Modern Cosmologists, Harvard University Press, 2001-09-27 09:32:29.0
is a kind of galaxy catalog2001-09-27 09:32:29.0
galaxy cataloghas object type galaxy or nebula (some nebulae are misidentified as galaxies)2001-09-27 09:32:29.0