eclipsing variable star
- or eclipsing binaryBinary star in an orbit whose plane passes through or very near Earth.An observer on Earth sees one star pass periodically in front of the other and diminish its light through an eclipse. The star Algol, in the constellation Perseus, was the first such star recognized (1782); thousands are now known. By combining the brightness variations with spectroscopic information for both stars, astronomers can determine the mass and size of each star. See also variable star.
* * *pair of stars revolving about their common centre of mass in an orbit whose plane passes through or very near the Earth. An observer on the Earth thus sees one member of the binary pass periodically over the face of the other and diminish its light through an eclipse. The star Algol was the first recognized as an eclipsing binary, by John Goodricke (Goodricke, John), in 1782. Thousands are now known. By combining measurements of the brightness variations with spectroscopic information for both stars of the pair, astronomers can determine the mass and size of each star. See also variable star; binary star.
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eclipsing variable star — noun a variable star whose changes in brightness are caused by periodic eclipses of two stars in a binary system … Australian English dictionary
eclipsing double star — noun see eclipsing variable … Useful english dictionary
variable star — Astron. a star that varies markedly in brightness from time to time. Also called variable. [1780 90] * * * Star whose observed brightness varies noticeably in intensity. Pulsating variables expand and contract in cycles, pulsating rhythmically in … Universalium
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
eclipsing variable — noun also eclipsing double star or eclipsing binary Etymology: eclipsing from present participle of eclipse (II) : a binary star in which the orbit plane lies near the line of sight so that one or both of the stars may eclipse the other as they… … Useful english dictionary
eclipsing variable — Astron. a variable star whose changes in brightness are caused by periodic eclipses of two stars in a binary system. Also called eclipsing binary. [1920 25; ECLIPSE + ING2] * * * … Universalium
Eclipsing Variable — A Binary System where one star is brighter than the other. As one star eclipses the other, the brightness increases or decreases, as seen from the Earth. This change in brightness may take hours or years … The writer's dictionary of science fiction, fantasy, horror and mythology
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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