- Binary - Variable star
- Astronomy: B-V
Универсальный русско-английский словарь. Академик.ру. 2011.
Binary - Variable star
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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
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
Semiregular variable star — Semiregular variable stars are giants or supergiants of intermediate and late spectral type showing considerable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities. Periods lie in the range from 20… … Wikipedia
eclipsing variable star — or eclipsing binary Binary 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… … Universalium
Symbiotic variable star — A Symbiotic Variable star is a variable binary star system in which one star has expanded its outer envelope and is shedding mass quickly, and another hot star (often a white dwarf) is ionizing the gas [… … Wikipedia
extrinsic variable star — noun a variable star that changes brightness because of some external factor rather than as a result of an internal change in radiation emitted, such as being eclipsed by another star in a binary system, or as a result of its own rotation… …
periodic variable star — noun a variable star which changes brightness in a regular, repeated cycle of fixed duration, such as that occurring in the orbiting pattern of a binary star system …
eclipsing variable star — noun a variable star whose changes in brightness are caused by periodic eclipses of two stars in a binary system …
Cataclysmic variable star — Cataclysmic variable stars (CV) are stars which irregularly increase in brightness by a large factor, then drop back down to a quiescent state. They were initially called novae, from the Latin new , since ones with an outburst brightness visible… … 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
Binary star — For the hip hop group, see Binary Star (band). Hubble image of the … Wikipedia
