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Filling in the background

Data from NASA's Wilkinson Microwave Anisotropy Probe reveal the cosmic microwave background in more detail than ever before. But will cosmology become a victim of its own success?

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Figure 1: Temperature fluctuations in the cosmic microwave background.



  1. Smoot, G. et al. Astrophys. J. 396, L1–L4 (1992).

    Article  ADS  Google Scholar 

  2. Bennett, C. L. et al. Preprint astro-ph/0302207 at <> (2003).


  4. Hu, W. & Dodelson, S. Annu. Rev. Astron. Astrophys. 40, 171–216 (2002).

    Article  ADS  Google Scholar 

  5. Leitch, E. M. et al. Nature 420, 763–771 (2002).

    Article  ADS  CAS  Google Scholar 

  6. Kovac, J. M. et al. Nature 420, 772–787 (2002).

    Article  ADS  CAS  Google Scholar 

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Correspondence to Sean Carroll.

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Carroll, S. Filling in the background. Nature 422, 26–27 (2003).

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