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The Curvature of Space

The Curvature of Space. The Isotropic and Homogeneous Universe. What does curved space look like?. The Expansion of the Universe. The Doppler Effect. Galaxy Spectra are Redshifted. Edwin Hubble (1889-1953). Hubble Diagram (1929). V = H r H ~ 500 km/s / Mpc (first measurement!).

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The Curvature of Space

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  1. The Curvature of Space The Isotropic and Homogeneous Universe What does curved space look like?

  2. The Expansion of the Universe

  3. The Doppler Effect

  4. Galaxy Spectra are Redshifted

  5. Edwin Hubble (1889-1953) Hubble Diagram (1929) V = H r H ~ 500 km/s / Mpc (first measurement!)

  6. The 2dF galaxy redshift survey 250,000 galaxies

  7. The Most Recent Hubble Diagram

  8. Cosmological expansion Expansion causes wavelength of light to increase - REDSHIFT For distant galaxies, distance is proportional to redshift – related by the Hubble constant Redshift surveys = measuring the redshifts of many galaxies… distance and look-back time 13 to 14 Gyr (billion yrs) = age of Universe

  9. Cosmic expansion Comoving coordinates remain the same

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