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Climbing up the cosmic ladder

Study of an under-appreciated subclass of stars that brighten and dim periodically brings to light their potential use as cosmic yardsticks — out to distances of a few hundred million light years.

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  1. Bird, J. C., Stanek, K. Z. & Prieto, J. L. Astrophys. J. 695, 874–882 (2009).

    Article  ADS  CAS  Google Scholar 

  2. Freedman, W. L. et al. Astrophys. J. 553, 47–72 (2001).

    Article  ADS  Google Scholar 

  3. Riess, A. G. et al. preprint at (2009).

  4. Komatsu, E. et al. Astrophys. J. Suppl. Ser. 180, 330–376 (2009).

    Article  ADS  Google Scholar 

  5. Tammann, G. A., Sandage, A. & Reindl, B. Astron. Astrophys. Rev. 15, 289–331 (2008).

    Article  ADS  Google Scholar 

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Lahav, O. Climbing up the cosmic ladder. Nature 459, 650–651 (2009).

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