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RR Lyrae star

noun

  1. Astronomy. one of a group of pulsating variable stars found in the halo of the Milky Way, with periods between 1.2 and 30 hours; all have approximately the same luminosity and are therefore used for measuring distances.


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Word History and Origins

Origin of RR Lyrae star1

< New Latin: RR (variable star designation) of Lyra

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