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What are the effects of Spacetime Drag ?

  1. Mar 7, 2010 #1
    What are the effects of Spacetime "Drag"?

    I have learnt that general relativity predicts that a rotating body (such as earth) produces not only a curve in the spacetime continuum, but it also 'drags' spacetime in the direction of rotation.

    1) How is this possible?

    2) What effects does this have on bodies in this region?

  2. jcsd
  3. Mar 8, 2010 #2
    Re: What are the effects of Spacetime "Drag"?

    Among other things, it would cause an object that was initially placed stationary relative to the spinning object to start revolving around the object, along with the usual gravitational fall. For something like the Earth, this effect is very very tiny.

    You might also want to look at this: http://en.wikipedia.org/wiki/Gravitomagnetism
  4. Mar 8, 2010 #3
    Re: What are the effects of Spacetime "Drag"?

    You could also research my nickname. http://en.wikipedia.org/wiki/Frame-dragging (extreme version in Kerr BH's Ergoregion)

    and of course...

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