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RR Lyrae star

noun

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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Also called cluster variable.

Origin of RR Lyrae star

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

Words nearby RR Lyrae star

-rrhaphy, -rrhea, -rrhexis, -rrhiza, -rrhoea, RR Lyrae star, RRM, rRNA, RRP, R.R.R., RRSP
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020