1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Is it possible to be completely still in space?

  1. Jan 31, 2013 #1
    So we are on a rotating planet, which also hurdles through space orbiting the sun, which also is hurdling through space orbiting the center of the galaxy. Is it possible to be motionless in space?
     
  2. jcsd
  3. Jan 31, 2013 #2

    phinds

    User Avatar
    Gold Member

    Relative to what? Motion is relative. If you are searching for an absolute frame of reference, there isn't one.
     
  4. Jan 31, 2013 #3
    What about the cosmic microwave background; could that not be considered as an absolute F of R?
     
  5. Jan 31, 2013 #4

    phinds

    User Avatar
    Gold Member

    No, there is not such thing as an absolute frame of reference. You can state the Earth's velocity (or anything else's velocity if you wish) relative to the CMB, but it is not an absolute velocity in any sense.
     
    Last edited: Jan 31, 2013
  6. Jan 31, 2013 #5

    Drakkith

    User Avatar
    Staff Emeritus
    Science Advisor

    Ask yourself this. What does "absolute reference frame" mean?
     
  7. Jan 31, 2013 #6
    The CMB does define a frame of reference, but the laws of physics don't single out that frame of reference as special.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...