I found this article dated 2012: Our Sun Moves More Slowly Than Thought - Scientific American
Data from NASA's Interstellar Boundary Explorer (IBEX) spacecraft reveals our sun is zipping through the local interstellar cloud at about 52,000 miles per hour. This is roughly 7,000 mph slower than previously thought, enough to keep a bow shock from developing.
The universe is simply stretching. There's nothing outside of the universe because the universe is all there is. It's not expanding into anything because there's nothing to expand into. Go on, prove me wrong!
To quantify the expansion of the universe, every 3.3 million light-years farther away a distant galactic cluster is from us, it appears to be moving 46 miles per second faster. However, be aware that this estimate is subject to change!
Only in the sense of nil, zero, nowt, zilch, nix, not a dicky bird, not a sausage, sweet FA, zip or nada (I'll leave out the more vulgar similar terms!).
Can 'something' exist without first accepting the existence of 'nothing'? Perhaps that's what you mean to ask.
However, I'm more into Natural Philosophy (Physics) than Philosophy (the study of the fundamental nature of existence), so you tell me.
Can 'something' exist without first accepting the existence of 'nothing'? Perhaps that's what you mean to ask.
However, I'm more into Natural Philosophy (Physics) than Philosophy (the study of the fundamental nature of existence), so you tell me.
This where are discussion is getting rather circular.
Clearly "nothing" is the simple way of looking at empty space. The vacuum.
But it's a sea of virtual particles according to Quantum Field Theory.
And the analogy of us living on the surface of an expanding 2-sphere (football) doesn't explain what we see. It must be a 3-sphere, and that exists within a 4D space: 4D space or 4D space-time. I dunno. But IIRC, you can turn a 2-sphere inside out in 4D space without breaking any rules.
n-sphere - Wikipedia
Which only Felix Klein would understand. Since he was good at that sort of thing.
Of course the string theory camp like the small hidden dimensions:
Calabi–Yau manifold - Wikipedia
In summary, I haven't got a clue!
Clearly "nothing" is the simple way of looking at empty space. The vacuum.
But it's a sea of virtual particles according to Quantum Field Theory.
And the analogy of us living on the surface of an expanding 2-sphere (football) doesn't explain what we see. It must be a 3-sphere, and that exists within a 4D space: 4D space or 4D space-time. I dunno. But IIRC, you can turn a 2-sphere inside out in 4D space without breaking any rules.
n-sphere - Wikipedia
Which only Felix Klein would understand. Since he was good at that sort of thing.
Of course the string theory camp like the small hidden dimensions:
Calabi–Yau manifold - Wikipedia
In summary, I haven't got a clue!
The one thing the universe is thick with from one end to the other is time. If you perturb it, it radiates out as a ‘time differential’ (ie a field).
When this field then interacts with other matter, it imparts energy to that object because in effect it is causing the receiving object to change its local (ie existing) time with respect to what it was and/surrounding objects. An example of this is a gravitational wave. I think that’s what a photon is as well - just a perturbation in the time field. This phenomena is completely relativistic and allows energy to be transmitted across what we call a vacuum which I would define as what’s left if you remove everything other than time.
And this ‘vacuum’ is very ‘heavy’ - like treacle. If you want to change an object’s time wrt to another object, you have to expend very large amounts of energy to do. You can do a thought experiment with two objects in inter-galactic space. The objects are moving alongside each other in a near as damn it zero gravitational field. If you shift one of the objects time wrt to other, even by a small amount, you need a lot of energy, ie the treacle analogy.
When this field then interacts with other matter, it imparts energy to that object because in effect it is causing the receiving object to change its local (ie existing) time with respect to what it was and/surrounding objects. An example of this is a gravitational wave. I think that’s what a photon is as well - just a perturbation in the time field. This phenomena is completely relativistic and allows energy to be transmitted across what we call a vacuum which I would define as what’s left if you remove everything other than time.
And this ‘vacuum’ is very ‘heavy’ - like treacle. If you want to change an object’s time wrt to another object, you have to expend very large amounts of energy to do. You can do a thought experiment with two objects in inter-galactic space. The objects are moving alongside each other in a near as damn it zero gravitational field. If you shift one of the objects time wrt to other, even by a small amount, you need a lot of energy, ie the treacle analogy.
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So, moving through spacetime is like wading through treacle!
It must be a consequence of quantum field theory, but I don't think the average mortal (i.e. ME!) is able to grasp it.
You might as well say "Fock space," for all that means to me!
Fock space in nLab
It must be a consequence of quantum field theory, but I don't think the average mortal (i.e. ME!) is able to grasp it.
You might as well say "Fock space," for all that means to me!
Fock space in nLab
Attachments
TBH, Bonsai, I didn't quite understand that either.
You are saying time is everything. A lot of people are saying time is emergent and a bit of an illusion.
Interesting usual baffling stuff at Quanta Magazine:
Cosmic Triangles Open a Window to the Origin of Time
Way I see it is that if Space is expanding, virtual pairs of particles get separated so fast they can't recombine. That is good. But explains nothing, especially why matter preponderates over anti-matter. de Sitter Space is a familiar buzzword too.
But I am no closer to enlightenment, but am encouraged that the Universe might be all symmetry and geometry. My favourite topics.
You are saying time is everything. A lot of people are saying time is emergent and a bit of an illusion.
Interesting usual baffling stuff at Quanta Magazine:
Cosmic Triangles Open a Window to the Origin of Time
Way I see it is that if Space is expanding, virtual pairs of particles get separated so fast they can't recombine. That is good. But explains nothing, especially why matter preponderates over anti-matter. de Sitter Space is a familiar buzzword too.
But I am no closer to enlightenment, but am encouraged that the Universe might be all symmetry and geometry. My favourite topics.
I thought I'd explained that adequately some time back, but hey, it's been a long thread!
But time is just a human construct - right? The only thing that do exist is order/change - no?
If so this would make Bonsai's stetement look like:
The one thing the universe is thick with from one end to the other is change.
Is suppose that undisputable escept for where its is 0K. There, nothing happens - still there is something there.
This is probably me repeating myself... :-/
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If so this would make Bonsai's stetement look like:
The one thing the universe is thick with from one end to the other is change.
Is suppose that undisputable
escept for where its is 0K. There, nothing happens - still there is something there.This is probably me repeating myself... :-/
//
Cosmic Triangles Open a Window to the Origin of Time
I have heard that cosmic circles are ever turning, but that was courtesy of Mike Pinder of The Moody Blues!
One Step into the Light Lyrics
I have heard that cosmic circles are ever turning, but that was courtesy of Mike Pinder of The Moody Blues!
One Step into the Light Lyrics
Quite possibly! Time might only exist in your head, say some physicists!
Time Might Only Exist in Your Head, Say Physicists
"which means the Universe had to have started off more ordered than it is now.."
Well a tennis-ball size universe seem to me a lot more ordered than what we have now
So if time is a convenient construct for human - what is the "correct" and natural corresponding entity to what we call time?
How is order defined (Unit?) and how can I measure it?
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Well a tennis-ball size universe seem to me a lot more ordered than what we have now
So if time is a convenient construct for human - what is the "correct" and natural corresponding entity to what we call time?
How is order defined (Unit?) and how can I measure it?
//
In the common sense, entropy means disorder.
In physics, entropy is the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work. Because work is obtained from ordered molecular motion, the amount of entropy is also a measure of the molecular disorder of a system.
Last orders please!
In physics, entropy is the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work. Because work is obtained from ordered molecular motion, the amount of entropy is also a measure of the molecular disorder of a system.
Last orders please!
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