...speculative theories of quantum gravity "foam" where there are space-time fluctuations on the Planck scale predict that images of extremely distant objects should be blurry.
http://74.125.45.132/search?q=cache:f9Xw2XgzFwQJ:en.wikipedia.org/wiki/Planck_time+planck+time&cd=1&hl=en&ct=clnk&gl=usYes, or in other words if there is a minimum scale in space or a minimum period in time it should make it impossible to focus shaprly over very great distances .
Hubble photos do not show this effect.
I would add that if there were such things as effective gravity waves objects sufficently distant to have crossed them should appear to move or even twinkle.
Another thing that doesn't happen.
So we can infer that the finest grain of space (time also)is either infanately small or so small that 13 billion lightyears of vector does not amplify it enough to see it.
And I add that gravity waves must necessacerily be either so weak or so rare that a vector of 13 billion years and a path 13 billion light years long does not reveil their effect as rare as thet makes one contemplate the idea that there are no gravity waves as Einstien envisaged.
Discovery channell is haveing a good special on the Universe right now .
