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Space is the gaps between stuff.
Quote from: alancalverd on 01/04/2018 12:50:45Space is the gaps between stuff.There are no gaps between stuff which are not occupied by quantum fluctuations. The reason absolute zero can never be reached is because space is full of quantum fluctuations. The Casimir effect proves the existence of quantum fluctuations.I meant to post the following link with the above https://en.wikipedia.org/wiki/Entropic_gravityEntropic gravity is also known as emergent gravity it is also based on quantum fluctuations.
Occupied being a clue there, things occupy space and space occupies things. Space is a dimension of nothing, it cannot be created or destroyed , it is timeless and ageless, it cannot be displaced. Move a box that contains space from one spot to another, the space in your box in the new spot is not the same space you started with.
1) Space is a substance which expands and contracts continuously. This expansion and contraction of space is due to quantum fluctuations constantly appearing and disappearing. The existence of Space is dependent on the existence of matter and quantum fluctuations without which space would not exist. 2) Dark Energy driving the expansion of space and gravity driving the contraction of space is directly due to quantum fluctuations.
I think Dirac answered that question, well, presented a good idea re. negative energy. Space wasn't mentioned other than space being a harbour to a sea of negative energy that had "holes" in it, which 2 years later from Dirac's postulate, the holes, were "filled" with the idea of the "positron", an electron that may as well have had in all appearance the reverse magnetic field to a normal electron owing to the fact the said positronic particle moved in the opposite to a normal electron under the influence of a magnetic field. Interesting to also note that astrophysical observations account for zero anti-matter activity. And yes, there was a lot of argument on the topic at the time.My point is, "space" "stretching" wasn't a core idea 70 or so years ago, "yet" the Casimir Effect is more often than not related to the idea of "negative energy" I'm thinking when I google the "Casimir Effect".
Space is expanding, the distance between galaxies is increasing at an accelerating rate,
The Box, Disinterested is looking for a reason for "nothing", an entity primarily made of nothing, "space", "expand". Disinterested is putting it primarily, the expansion of nothing, to the idea of "quantum fluctuations". He's rightly said that the universe is expanding and local effects keeps "stuff"/"matter" together. The issue is whether quantum fluctations are resposnisble for "nothing" expanding.
I know what you're saying about using grids to map the idea of space. Sometimes though using mathematical "grids" to map space, "empty space", "nothingness", is necessary, yet in light of other features "empty space" "harbours" may be necessary to go above and beyond the idea of the mathematical definition, 3-D, of purely empty space?
If space is nothing, a point is irrelevant, right, unless defined by another determinant?
Can you elaborate further? If a point is nothing, and space is nothing, and you're creating a volume in space using 4 points, say, it's still nothing, right, despite how you change the point distances from each other, right?
According to who or what standard of determining the volume of space and thus distance between points? I know what you're saying, don't get me wrong, yet as I said "space" as "nothing" may be "better" determined by what it "harbours"? Just an idea.