variable star

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Related to RR Lyrae: Cepheid variable, Cepheids

variable star

n.
A star whose brightness varies because of internal changes, periodic eclipsing by a mutually orbiting star, or periodic transiting of orbiting planets or other circumstellar material.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

variable star

n
(Celestial Objects) any star that varies considerably in brightness, either irregularly or in regular periods. Intrinsic variables, in which the variation is a result of internal changes, include novae, supernovae, and pulsating stars. See also eclipsing binary
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

var′iable star′



n.
a star that varies in brightness often in a regular period.
[1780–90]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

variable star

A star whose brightness changes periodically. The variation can occur because of internal changes in a single star or because a darker star periodically eclipses a brighter star in a binary star system.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

variable star

A star that varies in brightness because of internal changes or because it is periodically eclipsed by other bodies.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.variable star - a star that varies noticeably in brightnessvariable star - a star that varies noticeably in brightness
star - (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
At least 170 of these are of a special variety called RR Lyrae variables, which pulse with a period directly related to their intrinsic brightness.
The NGC 1466 also has 49 known RR Lyrae variable stars, which scientists use to measure distances in the universe.
If you ever took an astronomy course, you probably learned about the role of the pulsing RR Lyrae stars in astronomers' long and heroic construction of the cosmic distance scale.
Her team is working on a measurement of the Hubble constant without Cepheids, instead using two other types of stars: RR Lyrae variable stars and red giant branch stars.
Luminosities of SX Phoenicis, Large Amplitude Delta Scuti, and RR Lyrae stars.
KASC scientists also reported on the star RR Lyrae. It has been studied for more than 100 years as the first member of an important class of stars used to measure cosmological distances.
Lukas Plaut born; a German-born Dutch astronomer; worked at the Leiden Observatory; worked at the Kapteyn Laboratory in Groningen; studied RR Lyrae variables.
In addition, the atlas includes measurements of 599 Cepheid stars (43 newly discovered) and 2,595 RR Lyrae stars (343 new) around the south ecliptic pole.
The astronomers used the AAOmega spectrograph on the Anglo Australian Telescope near Siding Spring, Australia, and focussed on a well-known and ancient class of stars, called RR Lyrae variables.
The puzzle has to do with RR Lyrae stars, bright stars of the Milky Way that pulsate every few hours.
My 28-inch scope is big enough to show M5's RR Lyrae variables, which shine around 15th magnitude.
Another team, which includes Zeljko Ivezic of Princeton University, used the Sloan survey to examine a second group of elderly objects, known as RR Lyrae stars.