Philosophy Now Forum

What Is Spacetime Really Made Of?
Spacetime may emerge from a more fundamental reality. Figuring out how
could unlock the most urgent goal in physics—a quantum theory of gravity
Will we ever know the real nature of space and time?
Can we know the global structure of spacetime?
“How the hell could spacetime be the kind of thing that could be emergent?”
asks Eleanor Knox, a philosopher of physics at King’s College London.
THE FUTURE OF SPACE AT THE EDGE OF TIME
Modern physics is a victim of its own success. Because quantum physics and
general relativity are both so phenomenally accurate, quantum gravity is needed
only to describe extreme situations, when enormous masses are stuffed into
unfathomably tiny spaces. Those conditions exist in only a few places in nature,
such as the center of a black hole—and notably not in physics laboratories,
not even the largest and most powerful ones. It would take a particle accelerator
the size of a galaxy to directly test the behavior of nature under conditions where
quantum gravity reigns. This lack of direct experimental data is a large part of the
reason why scientists’ search for a theory of quantum gravity has been so long.
/ by Adam Becker /
https://www.scientificamerican.com/arti ... y-made-of/

socrat44 wrote: ↑Sat Jan 22, 2022 8:59 am What Is Spacetime Really Made Of?

What do the words 'spacetime' even mean or refer to, to you, EXACTLY?

When we hear this, then we can inform you of what so-called "spacetime" is made up of, EXACTLY.

socrat44 wrote: ↑Sat Jan 22, 2022 8:59 am Spacetime may emerge from a more fundamental reality. Figuring out how
could unlock the most urgent goal in physics—a quantum theory of gravity

WHY, EXACTLY, is a quantum theory of gravity a supposed URGENT goal in physics?

socrat44 wrote: ↑Sat Jan 22, 2022 8:59 am Will we ever know the real nature of space and time?

YES, WE ALREADY KNOW the REAL nature of 'space' and of 'time'.

socrat44 wrote: ↑Sat Jan 22, 2022 8:59 am Can we know the global structure of spacetime?

We still wait for how you define 'spacetime', EXACTLY.

socrat44 wrote: ↑Sat Jan 22, 2022 8:59 am “How the hell could spacetime be the kind of thing that could be emergent?”
asks Eleanor Knox, a philosopher of physics at King’s College London.
THE FUTURE OF SPACE AT THE EDGE OF TIME
Modern physics is a victim of its own success. Because quantum physics and
general relativity are both so phenomenally accurate, quantum gravity is needed
only to describe extreme situations, when enormous masses are stuffed into
unfathomably tiny spaces. Those conditions exist in only a few places in nature,
such as the center of a black hole—and notably not in physics laboratories,
not even the largest and most powerful ones. It would take a particle accelerator
the size of a galaxy to directly test the behavior of nature under conditions where
quantum gravity reigns. This lack of direct experimental data is a large part of the
reason why scientists’ search for a theory of quantum gravity has been so long.
/ by Adam Becker /
https://www.scientificamerican.com/arti ... y-made-of/

Because some one conjured up the word 'spacetime', then this in itself does NOT mean that 'spacetime' ACTUALLY EXISTS.

The word 'unicorn' has been conjured up also, but does a 'unicorn' ACTUALLY EXIST?

socrat44 wrote: ↑Sat Jan 22, 2022 8:59 am What Is Spacetime Really Made Of?

Age wrote: ↑Sat Jan 22, 2022 11:35 am Because some one conjured up the word 'spacetime', then this in itself does NOT mean that 'spacetime' ACTUALLY EXISTS.
The word 'unicorn' has been conjured up also, but does a 'unicorn' ACTUALLY EXIST?

Black Holes, Cosmic Collisions and the Rippling of Spacetime
By Katie Mack on June 12, 2017
People often ask me: “What is spacetime?
The easy answer is that it’s the "fabric of space.”
--
https://blogs.scientificamerican.com/ob ... spacetime/

socrat44 wrote: ↑Sat Jan 22, 2022 11:59 am

socrat44 wrote: ↑Sat Jan 22, 2022 8:59 am What Is Spacetime Really Made Of?

Age wrote: ↑Sat Jan 22, 2022 11:35 am Because some one conjured up the word 'spacetime', then this in itself does NOT mean that 'spacetime' ACTUALLY EXISTS.
The word 'unicorn' has been conjured up also, but does a 'unicorn' ACTUALLY EXIST?

Black Holes, Cosmic Collisions and the Rippling of Spacetime
By Katie Mack on June 12, 2017
People often ask me: “What is spacetime?
The easy answer is that it’s the "fabric of space.”
--
https://blogs.scientificamerican.com/ob ... spacetime/

LOL So, what 'space'(time) is is the 'fabric of itself' - space. Ah okay, that says about as much and as usual when 'things' are NOT YET KNOWN.

When the terms 'space' AND 'time' are defined CORRECTLY and ACCURATELY, then what is ACTUALLY the case becomes much more CLEARER.

See, the word 'time' refers to nothing more than just the duration between perceived events. I say, 'events' because in Reality there is NO more than just One event ONLY. While, the word 'space' just refers to the distance between, and/or around, matter.

Matter is allowed to move about freely because of 'space' (the distance between matter) and the label 'time' just refers to the motion of matter moving about freely.

This way of LOOKING AT and SEEING 'things' will help in explaining what 'it' is that is being sought here.

socrat44 wrote: ↑Sat Jan 22, 2022 8:59 am What Is Spacetime Really Made Of?

It's not, "made of," anything. It is a fictional metaphorical way of, "picturing," certain physical phenomena which have no actual observable attributes (i.e. cannot be seen, heard, felt, smelled, or tasted) but are known indirectly by the behavior of that which can be observed and are described mathematically.

Spacetime came about from an error Lorenz made and Winkowski fell for.

Neither space nor time can be seen. Matter exists in space and changes over time. Matter-change seems more appropriate. But read Newton and Einstein if you want answers.

socrat44 wrote: ↑Sat Jan 22, 2022 8:59 am What Is Spacetime Really Made Of?
Spacetime may emerge from a more fundamental reality.

Well... why stop there? What is fundamental reality really made of?

spacetime

Swiss watches made of Swiss cheese...

then again...

-Imp

Skepdick wrote: ↑Thu Feb 03, 2022 10:06 pm What is fundamental reality really made of?

the fundamental reality is cosmic vacuum where all matter (and everything) exists

socrat44 wrote: ↑Fri Feb 04, 2022 7:07 am

Skepdick wrote: ↑Thu Feb 03, 2022 10:06 pm What is fundamental reality really made of?

the fundamental reality is cosmic vacuum where all matter (and everything) exists

I am not sure this answers my question...

So what is cosmic vacuum made of?
What is matter made of?
What is everything made of?

What sort of cheddar is cheese made from?

When it comes to Swiss Cheese, I only eat the holes.

Skepdick wrote: ↑Fri Feb 04, 2022 10:50 am So what is cosmic vacuum made of?
What is matter made of?
What is everything made of?

the cosmic vacuum

socrat44 wrote: ↑Fri Feb 04, 2022 2:47 pm

Skepdick wrote: ↑Fri Feb 04, 2022 10:50 am So what is cosmic vacuum made of?
What is matter made of?
What is everything made of?

the cosmic vacuum

Oh. OK.

What are virtual particles made of?

Real physical space (vacuum) is a 4-D growing crystal of (meta) elementary (dual) particles… Real particles are more or less stable specific defects in its structure and antiparticles are corresponding complementary defects…