I think if space were shrinking and objects at the extreme ends of the universe were actually coming towards us rather than away, then all the objects would be blue-shifted and the ones most far away would be the most blue-shifted, which is EXACTLY opposite of what we are observing.
I think if space were shrinking and objects at the extreme ends of the universe were actually coming towards us rather than away, then all the objects would be blue-shifted and the ones most far away would be the most blue-shifted, which is EXACTLY opposite of what we are observing.
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Sure, contraction would look blue-shifted if you could view it as it happens. We can only observe distant objects as they were millions and billions of years ago as they were travelling away from us. We don’t know what those objects might be doing today. They could be accelerating toward us, but we would not know it.
It depends “when” you see it. If an object 400,000,000 light years away changed course and started accldeating toward us to day you would no see that change until 400,000,000 years from now. The deeper into space you look, the further you are “looking” into time. In a galactic context it makes no sense to be concerned by any of this as the Sun will be burned out, the Earth a cinder, and our civilsation long-long gone before any of this makes the slightest difference.
At the outer limits we are seeing light from the distant past not the present.