How can we see distant stars in a young universe?

bob b

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Ohhh!!!! I love pseudo-science. :crackup:



Wow. There's so many wonderful points to talk about. But lets start out with a simple issue:

What is to be said of the gravitational side-effects of moving hundreds of billions of galaxies billions of light years within the span of one week?

And a follow up question: Assume those galaxies were able to attain the velocities needed to move billions of light years within a single week, what is going to slow them down?

A side note: Whether we talk about a single week, or 6000 years is of no matter. When taking into account the vast distance that is 13 billion light years, the difference between 7 days and 6000 years becomes negligible.

You need to read up on the Big Bang "expansion of the coordinates of space". I suggest Wikipedia.

In this type of expansion the objects within the universe are not actually moving at all: the space between them is expanding. Thus they have no velocity due to the expansion.

The Red Shift in this type of expansion is not a Velocity Red Shift, it is an Expansion Red Shift.
 

Supremum

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Jukia said:
Please note that the person who posted earlier mentioning differential equations is only trying to cause trouble.
:idunno:
"No human investigation can be called real science if it cannot be demonstrated mathematically." - Leonardo da Vinci
 

bob b

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Metric expansion of space
From Wikipedia, the free encyclopedia
The metric expansion of space is a key part of science's current understanding of the universe, whereby spacetime itself is described by a metric which changes over time in such a way that the spatial dimensions grow or stretch as the universe gets older. It explains how the universe expands in the Big Bang model, a feature of our universe supported by all cosmological experiments, astrophysics calculations, and measurements to date.

The expansion of space is conceptually different from other kinds of expansions and explosions that are seen in nature. Our understanding of the "fabric of the universe" (spacetime) requires that what we see normally as "space", "time", and "distance" are not absolutes, but are determined by a metric that can change. In the metric expansion of space, rather than objects in a fixed "space" moving apart into "emptiness", it is the space that contains the objects which is itself changing. It is as if without objects themselves moving, space is somehow "growing" in between them. In the language of Riemannian geometry, expansion is an intrinsic effect: the universe is expanding, as measured intrinsically by distances between points, in contrast to the familiar extrinsic notion of an object expanding within an ambient space—there is no need for an ambient space to define expansion.

Because it is the metric defining distance that is changing rather than objects moving in space, this expansion (and the resultant movement apart of objects) is not restricted by the speed of light upper bound that results from special relativity.
 

Stripe

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Yes, but this is no different than what the Big Bang assumes. Once again I emphasize that Red Shift is a function of how much expansion occurred not the rate of expansion.
So could we list the potential causes of redshift?
 

Sealeaf

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By definition it is possible for God to do whatever He wants.

He could have made the whole universe yesterday and put it in place with physical evidence that it is older and with humans having false memories of childhoods they never had. If He did there is no way we would be able to tell.

The only problem with this is that it makes God a lying trickster.

If we say God is not a liar and has not faked the evidence, then we have to accept all the evidence. It is illogical to say He lied about some things and yet is truthful and worthy of trust.
 

bob b

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By definition it is possible for God to do whatever He wants.

He could have made the whole universe yesterday and put it in place with physical evidence that it is older and with humans having false memories of childhoods they never had. If He did there is no way we would be able to tell.

The only problem with this is that it makes God a lying trickster.

If we say God is not a liar and has not faked the evidence, then we have to accept all the evidence. It is illogical to say He lied about some things and yet is truthful and worthy of trust.

I agree.

God did not lie.

Our ability to see stars that are millions of light years away is a necessary consequence of the rapid expansion of the universe during Creation Week.
 

Stripe

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OK, Johnny, you can stop holding your breath. Your model does not discount Bob's proposal because you do not account for the fact that the star would be moving toward Earth both before and after expansion.
 

Mr Jack

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OK, Johnny, you can stop holding your breath. Your model does not discount Bob's proposal because you do not account for the fact that the star would be moving toward Earth both before and after expansion.
Doesn't matter.
 

Stripe

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Would you mind explaining why? As far as I can tell if a star was traveling towards Earth then its light waves would be more frequent than a star not traveling towards Earth. After expansion we would see the same thing.

The "7,000 year horizon" would not exist just as no horizon exists for distant stars whose light has not yet reached Earth under mainstream cosmology.
 

Mr Jack

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It doesn't matter because the expansion required by bob's notion would overwhelm the blue shift.

Why are we still talking about this anyway? Bob's notion predicts red shifts wildly different to those observed in the universe. It didn't happen.
 

Stripe

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It doesn't matter because the expansion required by bob's notion would overwhelm the blue shift.
Blueshift is a measure of difference. One star that in moving towards Earth at a higher rate than another star will have more blueshift.

Expansion would expand all lightwaves by the same degree leaving the difference just as noticeable before and after.

Why are we still talking about this anyway? Bob's notion predicts red shifts wildly different to those observed in the universe. It didn't happen.
No it doesn't. It simply assumes that the lightwaves we see were once packed into a much smaller piece of space. Same as BB theory.
 

Mr Jack

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Blueshift is a measure of difference. One star that in moving towards Earth at a higher rate than another star will have more blueshift.

Expansion would expand all lightwaves by the same degree leaving the difference just as noticeable before and after.
You'd get a difference yet, swamped

No it doesn't. It simply assumes that the lightwaves we see were once packed into a much smaller piece of space. Same as BB theory.
No, that's another bob's untruths. Bob's theory predicts vastly higher levels of red shift. Take a star 100,000 light years from us, scientific measurements show that the level of red shift on the light from this star is small; the light has undergone only a little expansion. Under bob's model this light has been expanded to at least 30 times it's original length. That produces a red shift wildly higher than any redshift observable in the universe! If star's were that red shifted we wouldn't be able to see them.
 
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