Post by authorgonal on May 29, 2010 15:09:17 GMT
My Opinion
The observed excessive red shift in far off galaxies - which has prompted some astronomers to consider that the expansion of the universe is accelerating - is due, I suggest, to the curvature of the universe. The universe is not accelerating (necessarily, and could be slowing). See explanation below.
Note: The difference between the red shift expected and the red shift observed could be used to determine the size of the universe based on an assumption that the expansion is constant (not speeding up and not slowing).
Reasoning:
1. Curvature of space near a gravity well rotates the 'normal' (perpendicular to space). The rotation dilates time as per special relativity (rotation due to speed) and general relativity (time slowing in a gravity well as a result of rotation as space curves into the well).
2. Over large distances (say 9+ billion light years) the curvature of the universe becomes more obvious, time is dilated through a slight rotation, and extra red shift is observed.
3. The 'extra red shift' might be assumed to be wholly due to the curvature and consequently a definition of size (assuming a spherical shape). It might be however, that that the universe expansion is slowing and the evidence is hidden by the curvature effects.
The link between time dilation and rotation is not immediately obvious therefore I wish to provide a reference:
Page 92/93, Spacetime Physics, 2nd Edition, by Edwin F Taylor and John Archibald Wheeler
The observed excessive red shift in far off galaxies - which has prompted some astronomers to consider that the expansion of the universe is accelerating - is due, I suggest, to the curvature of the universe. The universe is not accelerating (necessarily, and could be slowing). See explanation below.
Note: The difference between the red shift expected and the red shift observed could be used to determine the size of the universe based on an assumption that the expansion is constant (not speeding up and not slowing).
Reasoning:
1. Curvature of space near a gravity well rotates the 'normal' (perpendicular to space). The rotation dilates time as per special relativity (rotation due to speed) and general relativity (time slowing in a gravity well as a result of rotation as space curves into the well).
2. Over large distances (say 9+ billion light years) the curvature of the universe becomes more obvious, time is dilated through a slight rotation, and extra red shift is observed.
3. The 'extra red shift' might be assumed to be wholly due to the curvature and consequently a definition of size (assuming a spherical shape). It might be however, that that the universe expansion is slowing and the evidence is hidden by the curvature effects.
The link between time dilation and rotation is not immediately obvious therefore I wish to provide a reference:
Page 92/93, Spacetime Physics, 2nd Edition, by Edwin F Taylor and John Archibald Wheeler
it may be that there really is an acceleration .... as well ... 