NGC 225 is an open cluster in the constellation Cassiopeia. References 1. ^ R. W. Sinnott, editor (1988). The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation and Cambridge University Press. ISBN 0-933-34651-4. 2. ^ a b c SIMBAD Astronomical Database. Results for NGC 225. Retrieved on 2006-05-29. Retrieved from "http://en.wikipedia.org/"
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