Gravity Probe B and 'frame dragging'

  • Thread starter Ian
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  • #1
Ian
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Am I right in assuming that Gravity Probe B has proved that the rotation of the earth (@~465metres /sec.) 'swirls' space-time in the same sort of way that a rotating ball will swirl a fluid?

I ask because if this is the case, then the forward motion of the earth (@~360km/sec.) must also produce a linear dragging which is detectable, much like a speedboat leaves a wake in it's path.

Also, if the rotating mass of the earth causes frame dragging then common sense insists that matter must also 'displace' space time in a manner similar to Archimedes principle.
 

Answers and Replies

  • #2
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Hi Ian,

as far as I lnow after over forty years in the making they are still analysing the data of gravity probe B and we are still waiting for the 2 sigma confidence level results. The frame dragging effect is microscopic and was unfortunately swamped by noise in the data that is something like a hundreds times larger than the signal they are looking for, which is why it is taking so long to analyse.

Not sure about the linear dragging effect.

A good thread monitoring the progress of Gravity Probe B results is here https://www.physicsforums.com/showthread.php?t=104694&page=20
 
  • #3
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I ask because if this is the case, then the forward motion of the earth (@~360km/sec.) must also produce a linear dragging which is detectable, much like a speedboat leaves a wake in it's path.
.
Maybe not. I think the Michelson Morley type tests would have detected it. More likely the forward motion of the earth is orbiting synchronously with a latent frame dragging caused during the origin of the solar system.
 

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