Cepheid



Astronomy. a northern circumpolar constellation between Cassiopeia and Draco.
Also, Kepheus. Classical Mythology. an Ethiopian king, the husband of Cassiopeia and father of Andromeda.
Historical Examples

noun (Latin genitive) Cephei (ˈsiːfɪˌaɪ)
a faint constellation in the N hemisphere near Cassiopeia and the Pole Star See also Cepheid variable
noun
(Greek myth) a king of Ethiopia, father of Andromeda and husband of Cassiopeia
n.

type of variable star, 1904, from Delta Cephi, the name of the first such star identified, which is in the dim northern constellation Cephus, named for Greek Kepheus, a mythical king. With -id.
Cepheid
(sē’fē-ĭd, sěf’ē-)
Any of a class of variable stars whose luminosity fluctuates with an extremely regular period. There is a strong correlation between the absolute magnitude of a Cepheid’s luminosity and its period. By comparing the apparent magnitude of a Cepheid to the absolute magnitude corresponding to its period, it is possible to determine fairly accurately how distant the Cepheid is from Earth. Also called Cepheid variable.
Cepheus
(sē’fys’, -fē-əs)
A constellation in the Northern Hemisphere near Cassiopeia and Draco.

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  • Cepheid-variable

    a variable star in which changes in brightness are due to alternate contractions and expansions in volume. noun (astronomy) any of a class of variable stars with regular cycles of variations in luminosity (most ranging from three to fifty days). There is a relationship between the periods of variation and the absolute magnitudes, which is […]

  • Cepheus

    Astronomy. a northern circumpolar constellation between Cassiopeia and Draco. Also, Kepheus. Classical Mythology. an Ethiopian king, the husband of Cassiopeia and father of Andromeda. Historical Examples noun (Latin genitive) Cephei (ˈsiːfɪˌaɪ) a faint constellation in the N hemisphere near Cassiopeia and the Pole Star See also Cepheid variable noun (Greek myth) a king of Ethiopia, […]



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