Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Plural form of
cepheid .
Etymologies
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Examples
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Pulsating stars (so-called cepheids) have long been used as one of the best means to determine distances in astronomy.
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M31 offers an excellent chance to study more typical disk populations, in a manner which might be extended to more distant galaxies where such variables are still visible, probing a much more evenly spread progenitor age distribution than cepheids {and perhaps useful as a distance scale alternative or cross-check}.
SpaceRef Top Stories 2009
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