period-luminosity relation

period-luminosity relation

[′pir·ē·əd ‚lü·mə′näs·əd·ē ri‚lā·shən]
(astronomy)
Relation between the periods of Cepheid variable stars and their absolute magnitude; the absolutely brighter the star, the longer the period.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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