[Kryptid]

Spacetime expands

Actually, it's only space that expands. I don't think that time "expanding" even makes sense.

[Bored chemist]

What's the French word for "Spacetime"?

According to google, it's "espace-temps".

But suppose he'd been operating in French.

Then he would have used the letter W rather less.
So what?

It's not as if the French are all that bothered about "Le weekend".
Also, the French may bung a hyphen into it, but it's still a compound noun.
https://fr.wikipedia.org/wiki/Espace-temps#:~:text=En%20relativit%C3%A9%20restreinte%2C%20l'espace,de%20m%C3%AAme%20en%20relativit%C3%A9%20g%C3%A9n%C3%A9rale.
Including " En réalité, ce sont deux versions (vues sous un angle différent) d'une même entité."
i.e. "
In reality, they are two versions (seen from a different angle) of the same entity."

[talanum1 (OP)]

See:

for the idea that everything is made of the hypergraph that is space. See this at 42 minutes into the video.

[charles1948]

Nobody's going to watch a video that long.

We require verbal pith.

[talanum1 (OP)]

I added a timestamp: you don't need to watch the whole video.

I don't know what "pith" means.

[talanum1 (OP)]

After seeing this video:

I now think matter is made out of space not spacetime.

They are actually made of a copy of all of 2-dimensional space with one axis multiplied by i.

[Bored chemist]

I now think matter is made out of space ...

It can't be- by definition.

[charles1948]

I now think matter is made out of space ...

It can't be- by definition.

I agree with BC.  "Space" must, by definition, be something different from "Matter".  Space is the absence of matter.

[talanum1 (OP)]

Space is the absence of matter.

That definition cannot be right because it also defines "space" outside the Universe.

The definition: "space = R^3" is better. No matter is mentioned and it is compatible with my model.

[charles1948]

Space is the absence of matter.

That definition cannot be right because it also defines "space" outside the Universe.

The definition: "space = R^3" is better. No matter is mentioned and it is compatible with my model.

What do we mean by the "Universe"?
Surely it must mean "Everything there is".  If so, then how can there be anything "Outside" it, as you seem to imply.

Actually, I think you'd make a better case by asserting that there's no true "Space" at all.
Wouldn't that be supported by Quantum Theory.
 
As I understand it, QT maintains that Space isn't really empty.  It's full of matter particles which continually pop in and out of existence.  One moment there's a particle, then it's gone again.  Too quick to spot it.

Except, this perpetual popping of particles creates Dark Energy.  And this energy drives the accelerating expansion of the Universe.

Well, it's a theory. I suppose.  Does it sound credible, you reckon?

[Bored chemist]

That definition cannot be right because it also defines "space" outside the Universe.

You must have a wonky definition of "universe".

[Petrochemicals]

I now think matter is made out of space ...

It can't be- by definition.

I agree with BC.  "Space" must, by definition, be something different from "Matter".  Space is the absence of matter.

Does space exist within molecular lattices, atoms or nucleons?

[talanum1 (OP)]

Does space exist within molecular lattices, atoms or nucleons?

It exists within molecular lattices and atoms, but not inside nucleons.

You must have a wonky definition of "universe".

I believe there is an outside to the Universe, but it is nothing and cannot be described by R^3.

I made a dark matter particle. It interacts only by gravity so Earth cannot put it in my throat.

[Bored chemist]

Earth cannot put it in my throat.

Do you realise that when you say stuff like that people stop taking you seriously?

[Dave Lev]

I now think matter is made out of space not spacetime.

Based on Einstein you are fully correct.
https://www.discovermagazine.com/the-sciences/einsteins-lost-theory-describes-a-universe-without-a-big-bang
"And so Einstein proposed a revision of his model, still with a cosmological constant, but now the constant was responsible for the creation of new matter as the universe expanded (because Einstein believed that in an expanding universe, the overall density of matter had to still stay constant):"

[Bored chemist]

Based on Einstein you are fully correct.

No.
Einstein knew the difference between matter and space.

[yor_on]

This one made me smile.

sweet stuff.
You have a active imagination talanum