intrinsic variable star

a variable star which changes brightness because of some process within the star that changes the surface temperature.

Australian English dictionary. 2014.

Look at other dictionaries:

  • variable star — /ˈvɛəriəbəl sta/ (say vairreeuhbuhl stah) noun a star the brightness of which changes. See Cepheid variable star, extrinsic variable star, intrinsic variable star, irregular variable star, periodic variable star …   Australian English dictionary

  • Variable star — A star is classified as variable if its apparent brightness as seen from Earth changes over time, whether the changes are due to variations in the star s actual luminosity, or to variations in the amount of the star s light that is blocked from… …   Wikipedia

  • star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… …   Universalium

  • Star — For other uses, see Star (disambiguation) …   Wikipedia

  • star cluster — Astron. a number of stars of common origin held together as a group by gravitational attraction. Cf. globular cluster, open cluster, stellar association. * * * ▪ astronomy Introduction  either of two general types of stellar assemblages held… …   Universalium

  • long-period variable — noun : an intrinsic variable star whose light fluctuations are fairly regular and require many months or several years to complete one cycle …   Useful english dictionary

  • RR Lyrae variable — RR Lyrae variables are periodic variable stars, commonly found in globular clusters, and often used as standard candles to measure galactic distances. This type of variable is named after the prototype, the variable star RR Lyrae in the… …   Wikipedia

  • Cepheid variable — Astron. a variable star in which changes in brightness are due to alternate contractions and expansions in volume. Also, cepheid variable. [1900 05; CEPHE(US) + ID1] * * * One of a class of variable stars whose period of variation is closely… …   Universalium

  • RR Lyrae star — Astron. one of a group of pulsating variable stars found in the halo of the Milky Way, with periods between 1.2 and 30 hours; all have approximately the same luminosity and are therefore used for measuring distances. Also called cluster variable …   Universalium

  • cepheid variable — noun A radially pulsating (expanding and contracting) variable star with a regular period and known relationship between period and intrinsic brightness …   Wiktionary

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