Clock star | Article about clock star by The Free Dictionary
clock star A bright star, usually situated near the celestial equator, whose position and proper motion are very accurately known so that it can be used for the exact determination of time, for the determination of the error of observatory clocks, and for correction of the positional observations of other stars.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
clock star[′kläk ‚stär]
Any star that is used to measure time; always a bright star, whose right ascension is well known.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
Leddy nabbed Strawberry Alarm Clock star
performers Colm Hayes and Jim-Jim Nugent from FM104 and gave Marty the boot after three years at the helm.
The Rock Around the Clock star
had to disguise his face behind a hat and dark glasses to slip past the throng, after performing to more than 5,000 screaming fans at the Gaumont Theatre.
Cyrochronology uses starspots to clock stars
' rotation periods and thereby determine their ages, but it's only been used on cool, low-mass stars younger than 1 billion years.