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In a sense, yes. You can choose two points in the universe sufficiently far apart such that light can never travel from one point to the other (at the current rate of expansion).

In what sense? Can you provide a source for this information?

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It is important to understand that the "speed" of expansion is not through space but of space itself.

I get that. But, if the universe (space, time and matter) all began from an infinitely dense singularity; as the Borde-Guth-Vilenkin and Hawking-Penrose-Ellis theorems describe, and the expansion of said universe is not faster than the speed of light- then the light from the distant stars would be reaching us from the beginning of the expansion.

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Posted by Korkstand

Member since Nov 2003

28710 posts

Posted on 4/12/24 at 5:11 pm to Prodigal Son

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Where did that information come from?

Ultimately? The big bang.

What does your persistent hammering of this question have to do with evolution?

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Do you think your car is an illusion? Or was it intelligently designed?

Intelligently designed, of course. What's that got to do with evolution though?

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Cosmic Constants
-Gravitational force constant
-Electromagnetic force constant
-Strong nuclear force constant
-Weak nuclear force constant
-Cosmological constant

These are the handful of rules that govern the universe, as referred to in my Game of Life example above. I don't think either of us is equipped to discuss why the constants have the values they do, but if we did it would probably go something like this. I will suggest that these constants could have different values and the universe would still exist but look and work differently. Or, maybe the values are random and the universe just bang-crunched until we got to where we are. Or maybe there are infinite universes and these are just the values in ours. And you will say that obviously this is the one and only universe, and the one and only iteration of it, and these values were precisely and intelligently tuned by the magic man.

Close?

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-Initial Conditions and “Brute Facts
-Initial distribution of mass energy Ratio of masses for protons and electrons
-Velocity of light
-Mass excess of neutron over proton

These could probably be much different and the universe would still be here and just look and work differently.

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-“Local” Planetary Conditions
-Steady plate tectonics with right kind of geological interior
-Right amount of water in crust
-Large moon with right rotation period
-Proper concentration of sulfur
-Right planetary mass
-Near inner edge of circumstellar habitable zone
-Low-eccentricity orbit outside spin-orbit and giant planet resonances
-A few, large Jupiter-mass planetary neighbors in large circular orbits
-Outside spiral arm of galaxy
-Near co-rotation circle of galaxy, in circular orbit around galactic center
-Within the galactic habitable zone
-During the cosmic habitable age-

These qualities are likely to be found all over the universe.

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That’s a very broad, sweeping statement. Narrow it down, be specific, and let’s talk about it. I used to think the same thing. Until I really looked into it.

I'd really rather not.

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Posted by Korkstand

Member since Nov 2003

28710 posts

Posted on 4/12/24 at 5:21 pm to Prodigal Son

quote:
In what sense? Can you provide a source for this information?

Consider a partially inflated balloon. You put 3 dots on it, in a row, with 1" between them (so 2" from the first to the last). You inflate the balloon to double its circumference in 1 second. There are now 2" between the dots (so 4" from the first to the last). If you measure the speed that two adjacent dots moved away from each other, you get 1"/sec (from 1" to 2" in one second). But if you measure the speed that the two end dots moved away from each other, you get 2"/sec (from 2" to 4" in one second). The further apart 2 dots are, the faster they will move away from each other as the balloon is inflated. And no matter which dot you focus on, that one seems to be at the center of the expansion.

And so goes the universe. The further away something is, the faster it appears to be moving away from us. If it's far enough away, it will be moving away faster than light.

As for a source, have you really never heard this before?

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Posted by First Sergeant1