About 668,000 results
Open links in new tab
  1. Value of the Hubble parameter over time - Physics Stack Exchange

    Dec 15, 2011 · The physical interpretation of the Hubble time is that it gives the time for the Universe to run backwards to the Big Bang if the expansion rate (the Hubble "constant") were constant.

  2. Can the age of the universe actually be calculated through Hubble's ...

    Apr 20, 2023 · However, the Hubble constant was larger in the past, because objects, which in the past were at the unit distance from us, are now much further, and are moving (and were moving in the …

  3. cosmology - How is Hubble's constant (the expansion rate) predicted ...

    Feb 25, 2023 · How is Hubble's constant (the expansion rate) predicted from LCDM and the CMB? Ask Question Asked 2 years, 10 months ago Modified 1 month ago

  4. cosmology - Is my understanding regarding the relationship between …

    Jan 6, 2025 · However, the Hubble constant has been decreasing since the Big Bang. While this decrease occurs, the general trend of objects receding faster with increasing distance (as described …

  5. Units of Hubble Time and Hubble Constant? - Physics Stack Exchange

    Sep 10, 2014 · When we have Hubble constant and it's inverse Hubble Time (1/H) what units are they measured in? I know Hubble constant is in "km/s per Mpc" but is there any other units which are …

  6. Hubble time, the age of the Universe and expansion rate

    10 The Hubble time is about 14 billion years. The estimated current age of the Universe is about 13.7 billion years. Is the reason these two time are so close (a) a coincidence, or (b) a reflection that for …

  7. Is Hubble's constant really constant? - Physics Stack Exchange

    The behaviour in time of the hubble constant H yields whether the expansion speeds up of slows down. One can make models for the universe. The simpelest model is the Robertson-Walker universe in …

  8. Is there a relationship between the Cosmological constant and the ...

    Nov 16, 2015 · Since there currently exists uncertainty in precise evaluation of Hubble constant (known as the problem called "Hubble constant tension") - why there is no similar range uncertainty in the …

  9. Measured Value of Hubble's Constant - Physics Stack Exchange

    Dec 24, 2023 · So, is the value of Hubble's Constant calculated from this the present-day value, or the value from the past, when the supernova occurred? Also, would there be a significant difference …

  10. cosmology - The relationship between the Hubble Constant and ...

    Related to the discussion above, one typically defines a Hubble time, \tau by the following relationship: dt/d tau = 1/H, where "t" is standard clock time, and \tau is the cosmological time. This equation is …