- irregular variable stars
- неправильные переменные звезды
English-russian astronautics dictionary. - M.: Military Publishing house. Compiled by F. P. Suprun, K. V. Shirokov. 1964.
irregular variable stars
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Irregular variable — An irregular variable is a type of variable star in which variations in brightness show no regular periodicity. There are two main sub types of irregular variable: eruptive and pulsating.Eruptive irregular variables are divided into three… … Wikipedia
Variable irreguliere — Variable irrégulière Une variable irrégulière est un type d étoile variable dont les variations de luminosité ne présentent pas de périodicité définie. Il y a deux sous types principaux de variables irrégulières : les variables irrégulières… … Wikipédia en Français
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
Variable irrégulière — Une variable irrégulière est un type d étoile variable dont les variations de luminosité ne présentent pas de périodicité définie. Il y a deux sous types principaux de variables irrégulières : les variables irrégulières éruptives et les… … Wikipédia en Français
Orion variable — An Orion variable is a variable star which exhibits irregular and eruptive variations in its luminosity and is typically associated with diffuse nebulae. It is thought that these are young stars which will later become regular, non variable stars … Wikipedia
Cepheid variable — This article is about a class of pulsating stars. For the similarly named constellation, see Cepheus (constellation). Cepheids redirects here. For the fictional species, see Blind Alley . A Cepheid ( /ˈs … Wikipedia
Classical Cepheid variable — Classical Cepheids (also known as Population I Cepheids, Type I Cepheids, or Delta Cephei variables) are a type of Cepheid variable star. They are population I, variable stars that exhibit pulsation periods in the order of a few days to months,… … Wikipedia
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
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
Mira variable — Mira variables ( /ˈmaɪr … Wikipedia
