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2 results

  • 30 - Newtonian Dynamical Model of Universe Expansion

  • from Part V - Cosmology
  • Stan Owocki, University of Delaware
  • Book:
    Fundamentals of Astrophysics
    Published online:
    08 October 2021
    Print publication:
    03 June 2021, pp 235-242

  • Summary

    Hubble’s law gives us the simple and obvious interpretation that we currently live in an expanding universe. The inverse of Hubble’s constant defines the “Hubble time,” which effectively marks the time in the past since the expansion began. More realistically, one would expect the universe expansion to be slowed by the persistent inward pull of gravity from its matter. We consider how various theoretical models for the universe connect with the observable redshift that indicates its expansion.