Peterfrederick wrote:
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ErnieM wrote:
Is this the same as saying that distant objects will always be red shifted, never blue shifted?
0=========1=========2=========3==========4==========5==========6
0=========.1=========..2=========...3=========....4=========.....5=========......6
Assuming that objects on space between points 0 to 6 are moving from each other at a constant one period (.) per year per 10 units of distance (=). After one year, a photon travelling from point 6 towards the observer at point 0 will take six more periods(.) than a proton travelling from point 1.
Assuming all photon emitting objects at all 6 points have the same intrinsic movement of X relative to the observer at point 0, this X movement is less and less pronounced the farther the object is from the observer.
Therefore, although space between the observer and the objects are expanding at a constant rate of one (.) per year per 10 units of distance (=), the object at point 6 is red shifted the most.
Great explanation Ernie. That cleared up an issue I had. Thanks.
Thank you. You are so kind.
Above gets more interesting when shown in two and three dimensions of expanding space. Here is an attempt adding another dimension and the two galaxies M and Q at right angle to each other at time = 0.
6 4
= .
= .
= .
= .
5 =
= =
=
Q'
= =
= 3
4 .
= .
= .
= =
= =
3 =
= =
= 2
= .
= .
2 =
= =
= =
= =
= 1
1 .
= =
= =
Q =
= =
0 = M = = 1 = = = = 2 = = = = = 3 = = = = 4
0 = = = = . 1 = = = = . . 2 = = = = . . . 3 =
M' =
Over the same time period space has expanded at a constant rate but to the observer at
M', Q' has move much farther away. In other words, the expansion rate will appear to be accelerating.
Under the assumption that the farther away
Q' is, the harder it is to determine its angular momentum, this example puts into question the accuracy of the measurement of "how far back in TIME, or the AGE of galaxy
Q' based on the red shift of light.