cluster cepheids

cluster cepheids

[′kləs·tər ′sef·ē·ədz]
(astronomy)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Cluster Cepheids are treasured as important calibrators of the cosmic distance scale, and NGC 6664 is one of the few clusters known to possess one.