The Hubble constant and the expansion age of the Universe

@article{Freedman2000TheHC,
  title={The Hubble constant and the expansion age of the Universe},
  author={W. Freedman},
  journal={Physics Reports},
  year={2000},
  volume={333},
  pages={13-31}
}
Abstract The Hubble constant, which measures the expansion rate, together with the total energy density of the Universe, sets the size of the observable Universe, its age, and its radius of curvature. Excellent progress has been made recently toward the measurement of the Hubble constant: a number of different methods for measuring distances have been developed and refined, and a primary project of the Hubble Space Telescope has been the accurate calibration of this difficult-to-measure… Expand
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