Online Dictionary

Cepheid variable Explained

Cepheid variable at English => English (The Britannica Concise) Of Explained:

One of a class of variable stars whose period of variation is proportional to its luminosity and is therefore useful in measuring the distances to clusters of stars and galaxies. Named for the prototype of this class found in the constellation Cepheus, classical Cepheids have a dependable period-luminosity relationship, with periods from about 1.5 days to over 50 days, and are Population I stars (see Populations I and II). The longer a star's period, the greater its natural brightness; this relationship, discovered in 1912 by Henrietta Leavitt (1868-1921), has been used to establish the distance of remote star systems.

cepheid variable at English (WD) Of Explained:

==English==

Etymology

From Cepheus, the name of the constellation in which such stars were first discovered.

Noun

Inter: en-noun » head=cepheid variable
Inter: wikipedi » a
  • Inter: sta » r A radially pulsating (expanding and contracting) variable star with a regular period and known relationship between period and intrinsic brightness.

    Translations

    Inter: trans-top » radially pulsating variable star
    • French: Inter: t+ » fr|céphéide|f
    • Irish: Inter: t- » ga|réalta athraitheach Ceifide|f


    Inter: trans-mi » d
  • Spanish: Inter: t- » es|estrella variable Cefeida|f

  • Inter: trans-botto » m
    Translation: pl » cepheid variable