cepheid+variables

См. также в других словарях:

• 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

• cepheid — 1. adjective Relating to cepheid variables. 2. noun A cepheid variable …   Wiktionary

• 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

• Type II Cepheid — Type II Cepheids are variable stars which pulsate with periods typically between 1 and 50 days.[1][2] Type II Cepheids are population II stars and are thus old, typically metal poor, low mass objects.[1] Type II Cepheids were historically called… …   Wikipedia

• galaxy — /gal euhk see/, n., pl. galaxies. 1. Astron. a. a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. b. (usually cap.) See Milky Way. 2. any large and brilliant or impressive… …   Universalium

• Cosmic distance ladder — * Light green boxes: Technique applicable to star forming galaxies. * Light blue boxes: Technique applicable to Population II galaxies. * Light Purple boxes: Geometric distance technique. * Light Red box: The planetary nebula luminosity function… …   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

• 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

• 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

• Large Magellanic Cloud — The Large Magellanic Cloud Observation data (J2000 epoch) Constellation Dorado/Mensa …   Wikipedia

• Delta Cephei — For the variable star type, see Delta Cephei variable. For the general type of variable star, see Cepheid variable. Alrediph, δ Cep A/B Location of δ Cephei (bottom left) …   Wikipedia