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RR Lyrae |
Also found in: Wikipedia, Hutchinson | 0.01 sec. |
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RR Lyrae: see variable star variable star, star that varies, either periodically or irregularly, in the intensity of the light it emits. Other physical changes are usually correlated with the fluctuations in brightness, such as pulsations in size, ejection of matter, and changes in spectral ..... Click the link for more information. . How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The puzzle has to do with RR Lyrae stars, bright stars of the Milky Way that pulsate every few hours. Another team, which includes Zeljko Ivezic of Princeton University, used the Sloan survey to examine a second group of elderly objects, known as RR Lyrae stars. Applying the Cepheid results to our own galaxy, the astronomers recalibrated the brightness of RR Lyrae stars, another type of variable star. |
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