About space.

[socrat44]

About space.
----
There are two most important spaces:
1.
The space of classical physics.
This is the space of Euclid / Descartes / Newton.
This space is "gravitational" and for Newton (and us) it is absolute
and time in this space is also absolute (for ua)
Changes in gravitational space are subject to Galilean transformations.
2.
SRT space, GRT and Quantum physicist.
This is the subject of Riemann / Minkowski space
a) SRT is a space without "gravity".
Space without "gravitaty" is a flat and empty vacuum.
c) in SRT, light (independent) moves in vacuum (cosmic) with a constant speed (c)
c) the mathematician Minkowski called vacuum (cosmic) absolute 4D inseparable spacetime.
This mathematical unity really exists only in a cosmic vacuum.
d) Changes in the cosmic vacuum are subject to Lorentz transformations.
3.
Einstein put in flat cosmic vacuum Gravity-body and said that near it (for example, the Sun)
the flat cosmic vacuum is bended and the light changes its rectilinear motion.
This is true in the local region of infinite cosmic vacuum.
4.
From the point of view of the cosmic vacuum, all gravity-space and gravity-time are local and relative.
========...

[socrat44]

Hermann Minkowski: "The views of space and time which I wish to lay before you
have sprung from the soil of experimental physics, and therein lies their strength.
They are radical. Henceforth, space by itself, and time by itself, are doomed
to fade away into mere shadows, and only a kind of union of the two
will preserve an independent reality.“ /1908/
Minkowski explained the unity of spacetime using the light cone:

[alan1000]

What was the question again?

[Dr Jonathan Österman]

What was the question again?

The question is :

What is space made of ??

If space, or Einstein's spacetime, were made of no physical substance at all, then they simply would not exist at all, because to exist is to be made of something. Agreed?

If "something" is made of "nothing", then this "something" is "nothing" (does not exist). Period.

And, if space was made of some physical substance, then, in principle, we should be able to experimentally detect the physical existence of such substance, either directly or indirectly. Agreed?


So, what is space made of ??

[alan1000]

Do you recall how many socks and ballpoint pens you have lost during the course of your life? Where did they go?

Answer: there is a deep-state network run by aliens with mind-controlling space lasers which feeds them into black holes. Black hole evaporation then feeds them into dark energy networks which are undetectable to the Federal agencies charged with investigating lost socks and ballpoint pens.

I was reliable informed of this by my cousin's brother's nephew who knows somebody related by marriage to someone who once dated someone in the Department of Defense. Actually I'm not sure if it was the DoD; it might have been another department.

[nemos]

I think it's quite an attractive picture, in which everything that makes up our reality is based on energetic unevenness.
Let's say there was some kind of "big bang" that created an energy imbalance...
The smallest particle of matter known to us is ... a gamma quantum with 0 rest mass, the formula E=mc^2 also indicates energy, quantum theory still operates with energy levels. Time seems strongly related to the concept of inertia - because if there was no inertia, there would be no need to overcome it and changes in the state of matter could happen instantaneously and time would have no meaning, starting from the equations of relativity, where mass and time depend on speed, we see that for mass(inertia)=E/c^2 in the pursuit of infinity, time tends to stop.
Everything else is just a product of our perception, imagination and interpretation.
Accordingly, if our world is based on energetic imbalances, then it should be the case that with time these imbalances will level out and subside - along with our world.
So there may be a possibility that both in our world and we are energetic existences - like ghosts.

[socrattus]

The question is :
What is space made of ??
So, what is space made of ??

1- Earth's space (atmosphere) consist of different molecules.
2- Cosmic space (vacuum) made of Dirac’s “virtual particles”.
3- “virtual particles” appear in the Casimir effect, in the Lamb shift.

[Age]

What was the question again?

The question is :

What is space made of ??

If space, or Einstein's spacetime, were made of no physical substance at all, then they simply would not exist at all, because to exist is to be made of something. Agreed?

And, 'nothing', in a sense, is, literally, 'something'.

If "something" is made of "nothing", then this "something" is "nothing" (does not exist). Period.

Obviously, if the 'space' word is referring to 'an area', then there has to exist areas of 'no matter'. Or, as some people might like to say, 'areas of nothing'.

And, if space was made of some physical substance, then, in principle, we should be able to experimentally detect the physical existence of such substance, either directly or indirectly. Agreed?

Yes.

So, what is space made of ??

Well considering the irrefutable Fact that the Universe is not one solitary piece, particle, nor object of 'matter' this then means that there are separate pieces, particles, and/or objects of matter. Now, if the 'space', or distance, between these pieces, particles, or objects of matter want to be given a name or label, then the word 'space' would seem to be very appropriate.

Now, what these 'different areas of space' are made up of, exactly, then this would depend on what 'area' is one talking about and referring to, exactly.

Obviously, some areas are made up of physical substance/s, while other areas are made up of absolutely no physical substances.

[Age]

I think it's quite an attractive picture, in which everything that makes up our reality is based on energetic unevenness.
Let's say there was some kind of "big bang" that created an energy imbalance...

But why say this?

The smallest particle of matter known to us is ...

Who and/or what does the 'us' word here refer to, exactly?

Because, to 'others' the smallest particle of matter is different.

a gamma quantum with 0 rest mass, the formula E=mc^2 also indicates energy, quantum theory still operates with energy levels. Time seems strongly related to the concept of inertia - because if there was no inertia, there would be no need to overcome it and changes in the state of matter could happen instantaneously and time would have no meaning, starting from the equations of relativity, where mass and time depend on speed, we see that for mass(inertia)=E/c^2 in the pursuit of infinity, time tends to stop.

It is this type of completely over-complicating what is essentially Truly simple why these people, 'back then', were taking so, so long to come to comprehend and understand what is actually happening and occurring HERE, NOW.

Everything else is just a product of our perception, imagination and interpretation.

But, absolutely every thing is relative to the observer, even including the definitions of words like, for example, 'matter', 'space', and 'time'.

And, obviously, if one has or is using definitions of words that do not fit in perfectly what actually happens and occurs, actually is, was, and will be, then they will take 'some time' to learn, recognize, see, understand, and know what the actual Truth of things is here, exactly.

Accordingly, if our world is based on energetic imbalances, then it should be the case that with time these imbalances will level out and subside - along with our world.
So there may be a possibility that both in our world and we are energetic existences - like ghosts.

This is all only depended upon 'if' some things, right?

[Age]

The question is :
What is space made of ??
So, what is space made of ??

1- Earth's space (atmosphere) consist of different molecules.
2- Cosmic space (vacuum) made of Dirac’s “virtual particles”.
3- “virtual particles” appear in the Casimir effect, in the Lamb shift.

How is the word 'space' here, in this thread, being defined, exactly?

[Zarathustra]

Can Hilbert Space be applied to the physical space? Or is it just for the conceptual space only?

[wtf]

Can Hilbert Space be applied to the physical space? Or is it just for the conceptual space only?

Can you define Hilbert space without looking it up?

[socrattus]

As mentioned above, if time is two-dimensional and four-dimensional, and space is one-dimensional and five-dimensional, then of course space-time is an indivisible whole, because our classical universe is composed of one to six dimensions.

it seems you're an expert in extra dimensions