Quote:
Originally Posted by FRIPRO
The photo is not true stero as at the distance involved it would take Hubble millions of year to photgraph the change in the rotation or what ever you call it.
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I see where you're coming from. No, this is not true stereo. But, neither is the deep field a single moment in time. Ever-distant galaxies take longer for their light to reach us which means they're older.
If galaxies of increasing distance had tangent velocities to us (i.e. the universe is rotating) then we would see that rather easily. Distant galaxies would be squished in a uniform direction. No need to tweak the photo—that kind of thing would be very apparent.
Quote:
Originally Posted by FRIPRO
By shifting the true photo slightly one gets a stereo photo as if they waited the million of years to see.
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This is true to an extent, but your method is flawed. You are simply scaling the same image. This creates the perception of perspective toward the center of the photo regardless if that is the case or not.
A better method would be to pull the redder bits of the image into their own frame and the bluer bits into their own frame. Scale the red frame smaller than the blue. You could then combine them and put them back on the original image if you have a pair of 3D glasses, or leave them separate if you don't.
Point is: this method will not arbitrarily create perspective toward the center of the photo. It will make greater-redshifted galaxies appear further with bluer galaxies appearing closer (so long as your eye stays focused at the center of the combined image).
Looking at the HUDF, it's clear to me that blue and red is evenly distributed, so this should not show an overall pattern.
Redshift surveys agree.
~modest
