Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

B Is the universe expanding faster than expected

  1. Jun 10, 2016 #1

    wolram

    User Avatar
    Gold Member

    Here they use information gathered form Cepheids, are these parallax measurements accurate?

    From science daily.
    Date:
    June 2, 2016
    Source:
    Space Telescope Science Institute (STScI)
    Summary:
    Hubble Space Telescope astronomers have discovered that the universe is expanding 5-9% percent faster than expected. They made the discovery by refining the universe's current expansion rate to unprecedented accuracy, reducing the uncertainty to only 2.4%. The team made the refinements by developing innovative techniques that improved the precision of distance measurements to faraway galaxies. These measurements are fundamental to making more precise calculations of how fast the universe expands with time, a value called the Hubble constant.
     
  2. jcsd
  3. Jun 11, 2016 #2

    Garth

    User Avatar
    Science Advisor
    Gold Member

    You can read Adam Reiss et al.'s paper on the physics ArXiv here:Abstract A 2.4% Determination of the Local Value of the Hubble Constant and .pdf paper.


    Garth
     
  4. Jun 15, 2016 #3
    Hi. I'm trying to learn about this myself. What are the implications of a faster expanding universe?
     
  5. Jun 15, 2016 #4

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    Cosmologists now have to see if that value is still compatible with other, independent measurements. If yes, it helps to improve the precision of some parameters about the universe. If it is not consistent, it gets interesting.
     
  6. Jun 15, 2016 #5

    Chronos

    User Avatar
    Science Advisor
    Gold Member

    Interesting is probably sugar coating it, it gets downright ugly in a hurry. Scientists are habituated into assuming the fundamental laws of physics are fixed and unchanging, at least on times scales up to the age of the universe. If this assumption is falsified, everything we think we know about the universe is on shaky ground.
     
  7. Jun 15, 2016 #6

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    It would not be. It would just mean we don't understand the evolution of the universe between the very early stages and the current day well enough.
     
  8. Jun 16, 2016 #7
    What are some advantages and disadvantages of expanding universe ?
    And how it can affect us
     
  9. Jun 16, 2016 #8

    Chronos

    User Avatar
    Science Advisor
    Gold Member

    A universe that never expanded would gravitationally collapse, probably in less time than it took for earth to form. A universe that expands too fast would dilute matter to the point that not even stars could form.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted