| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024RR Lyrae star, - Astronomyone 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. Also called cluster variable.
- Neo-Latin: RR (variable star designation) of Lyra
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