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Related articles:
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Variable star
Globular cluster
Polaris
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Key terms: math cepheids stars variable galaxy log distance our gas within helium galactic period light hubble measured luminosity population types kappa ionized pulsation associated variable stars relationship rr lyrae classical cepheids universe milky way thought cepheid variables precision expansion reddening magnitude discovered identified calibration standard candle population ii galactic plane Search external links cited by footnotes on Wikipedia page Cepheid variable: |
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