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Not even a single word about space expansion.They clearly discuss about galaxies expansions (I have found 15 times the word - galaxies).
The expansion of space itself causes those photons of light to get spread further apart than if space was not expanding.
We only see the expansion in galaxies.
Without galaxies, it is clear that we won't get any sort of photon of light.
So, all the photons are ejected from the galaxies.
Therefore, in any sort of theory, we should agree that we monitor the photons that had been ejected from the galaxy itself and not from the space expansion.
Please also remember that both theories fully meet Hubble law and constant.
So, our scientists clearly verify that far away galaxy as it is expanding away from us at ultra high velocity. However, not even one word about expansion in space.
In other words - If this galaxy is moving through the space - its photons of light shouldn't get spread further apartWhile if it is carried by the space expansion than its photons of light should get spread further apart.Can you please prove this statement?
Yes, your message is very clear.
Do you agree that the expansion in space can't generate even one photon of light?
Hence, why are you so sure that if this galaxy was expensing away exactly at its current velocity and holding exactly the same features that we observe, its photons of light shouldn't get spread further apart if it was moving through the space??
Maybe go watch a car driving away from you and see if it looks like it's getting larger or smaller with distance.
In a static, unchanging space, the average angular diameter of galaxies should always fall off the same way with distance. A galaxy that is twice as far away will look twice as small.
The reason why it looks twice as big is that the expansion of space acts a bit like a magnifying glass.
That extra spread makes distant galaxies look larger than they would if space was not expanding.
No. Galaxies are gravitationally bound. They don't expand.What we see is an expansion of teh space between the galaxies.
We see that the galaxy is oddly magnified.If the light is just travelling through space, why would the photons be spread out in this way (in addition to the inverse square law)?One alternative that makes sense is that teh expanding universe is responsible (among other things) for the incongruous large size of this galaxy.Do you have a sensible altarnative explanation?
If you had an understanding of basic physics, you would realize why a group of photons is not bound in the same way as the stars in a galaxy are.
Remember when I said I was only going to explain it once? That was it.
Therefore, we see it so big.
I have quite good knowlage in physics
Except that's not what you see with gravitational lensing.You typically see a ring.https://en.wikipedia.org/wiki/Einstein_ringAnd that phenomenon is quite rare- it has to be lined up properly.
Therefore, at a relatively low distance we see that A galaxy that is twice as far away will look twice as small.However, as we look further away, the light is deflected by more and more BHs.Therefore, the light from the furthest galaxy is getting deflected by the maximal no of BHs.
but I still don't understand how the expansion of space itself causes group of photons of light of far end galaxy to get spread further apart than if space was not expanding.
Ah, so you don't understand physics (or even basic logic) as well as you think you do. Are you serious? You really don't understand why an expanding space will cause objects in that space that aren't bound to each other to spread out?
What in the world you think the words "expand" and "spread" mean?
If you agree with the above, would you kindly explain how the physics works at the expansion in space theory in order to expand/spread the light of the galaxy, without expanding/spreading the galaxy itself?
Would you kindly explain how a group of photons of far away galaxy that its size is fixed (no internal expansion or spreading over time) could expand/spread only based on the expansion in the space between the galaxies.
I honestly cannot believe you are asking me that question. Hmm, I wonder... how could expansion cause a group of objects that aren't bound to each other to spread out? What a mystery!
Therefore, HOW the expansion in space between the galaxies could expand the light that is coming from a fixed size far away galaxy?Please, do you have an answer or not?
Quote from: Dave Lev on 17/05/2020 06:22:29Therefore, HOW the expansion in space between the galaxies could expand the light that is coming from a fixed size far away galaxy?Please, do you have an answer or not?Are photons bound to each other? Think about the answer to that question and you'll have the answer to the question that you've given me.
Are photons bound to each other? Think about the answer to that question and you'll have the answer to the question that you've given me.