Cepheid variable

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Cepheid variable

One of a class of variable stars whose period of variation is closely related 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 periods from about 1.5 days to over 50 days and are Population I stars (see Populations I and II). The longer the period of such a star, the greater its natural brightness; this relationship was discovered in 1912 by the American astronomer Henrietta Leavitt (b. 1868—d. 1921).

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No references found			Cepheid variables, which are giant stars that pulse in brightness, have long been used as reference points for measuring distances in the nearby universe, according to Jonathan Bird, doctoral student in astronomy at Ohio State. Giant star may be used to measure distances up to 300 million light ... by Asian News International Delta is the prototype of the Cepheid variable stars which have proved invaluable in plumbing intergalactic distances. Starwatch by guardian.co.uk / guardian.co.uk 0339), the researchers suggest that tinkering with the core of a Cepheid variable using a beam of neutrinos could be an effective way for advanced civilizations to communicate. With a twinkle, pulsating stars could deliver signals from ET: ... by Cowen, Ron / Science News			Cephaloboidea Cephalocarida Cephalocereus Cephalochordata cephalodium Cephaloidae cephalomere cephalometry Cephalonia cephalont cephalopelvic disproportion Cephalophinae cephalopod Cephalopoda cephalosporin Cephalosporins Cephalotaxus cephalothin Cephalothorax Cephalothrididae cephalotrichous flagellation Cephalus Cephalus and Procris Cephas Cepheid Cepheid variable Cepheid variables Cepheus Cephidae Cephisodotus Cephoidea Cepi Cepphus cepstra cepstrum cepstrum vocoder CEPT CEQ CER Ceractinomorpha Ceram ceramagnet ceramal Cerambus Cerambycidae cerambycoid larva ceramet ceramic ceramic aggregate ceramic amplifier ceramic bond			Cephalothrididae Cephalotome Cephalotomy Cephalotomy Cephalotribe cephalotrichous flagellation Cephalotripsy Cephalotrocha cephalotrypesis Cephalotus Cephalotus follicularis Cephalous Cephalus Cephalus Cephalus and Procris Cephalus and Procris Cephaly Cephaly Cephaly Cephamandole Cephamycin Cephamycins cephapirin Cephapirin sodium Cephas Cephazolin Cepheid Cepheid Cepheid Cepheid Inc Cepheid variable Cepheid variable star Cepheid variable star Cepheid variable star Cepheid variable stars Cepheid variable stars Cepheid variable stars Cepheid variables Cepheid variables Cepheid variables Cepheids Cepheids Cepheids Cephelapod Cephelapod Cephelapod Cephelapods Cephelapods Cephelapods Cephelic Cephelic Cephelic Cephelosporins Cephelosporins Cephelosporins Cephelosporins Cephenemyia Cepheus Cepheus Cepheus Cepheus

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