tesso_messor Posted April 10, 2015 Share Posted April 10, 2015 hey so ive had this idea running through my head for a while now if relativity is true then spacetime has to have mass and if does then what is it made of? if it has mass then why cant we see it? why dont we know tis there? i believe that it is a simple solution. it is dark matter plain and simple. dark matter is not just dark matter but gravity and gravity is dark matter its similar to spacetime where space and time are not seperate but one and the same. just like dark matter and gravity. not diffrent but the same. and so it makes alot of sence why we have trouble finding dark matter. and the only reason we really know its there in the first place even though its invisible is that it distorts light but i think it dosent distort light tlike glass or anything like that i think the idea of dark matter is not correct. because it is not matter at all but just a high concentration of gravity in a single area. so if u think of it like that spacetime if it is dark matter then its actually just gravity and so gravity is spacetime. Link to comment Share on other sites More sharing options...
Klaynos Posted April 10, 2015 Share Posted April 10, 2015 Why do you think space time must have mass? Your idea hangs on this and I don't think it's true. Link to comment Share on other sites More sharing options...
ajb Posted April 10, 2015 Share Posted April 10, 2015 (edited) We don't think of space-time being made of anything, certainly not 'material'. Space-time is just space-time and has proved to be a very useful concept in physics. Similarly people don't ask what the electromagnetic field is made of, it is 'is'. Again, it is a very useful concept in physics. Why do you think space time must have mass? Your idea hangs on this and I don't think it's true. For sure it is not true that space-time must have mass, but you can have pure gravitational configurations that have energy and so mass. As you know the concepts of mass and energy in general relativity are subtle. Anyway, the rest of the post is in my opinion a non-starter. Edited April 10, 2015 by ajb Link to comment Share on other sites More sharing options...
michel123456 Posted April 10, 2015 Share Posted April 10, 2015 what is spacetime made of? Fabric. 1 Link to comment Share on other sites More sharing options...
Strange Posted April 10, 2015 Share Posted April 10, 2015 Fabric. A nice silk moire or a more chunky Harris tweed? Link to comment Share on other sites More sharing options...
StringJunky Posted April 10, 2015 Share Posted April 10, 2015 A nice silk moire or a more chunky Harris tweed? The Kings' new clothes are made of it. Link to comment Share on other sites More sharing options...
michel123456 Posted April 10, 2015 Share Posted April 10, 2015 (edited) A nice silk moire or a more chunky Harris tweed? I wonder what the standard physics have to say about that. I suppose tweed as it is more anglo-saxon. The universe cannot be of asiatic silk. Edited April 10, 2015 by michel123456 Link to comment Share on other sites More sharing options...
imatfaal Posted April 10, 2015 Share Posted April 10, 2015 One of our physics experts works on the mathematics of fibre bundles we should ask him which material. I have a feeling he is a Mancunian so he will probably answer "cotton". Link to comment Share on other sites More sharing options...
michel123456 Posted April 10, 2015 Share Posted April 10, 2015 Mancunian? I learned something today. I didn't know cotton was cultivated around Manchester. --------------- Anyway, serious now: Cotton is the material of the clouds. Silk is the material of worm holes Spacetime is synthetic. Link to comment Share on other sites More sharing options...
imatfaal Posted April 10, 2015 Share Posted April 10, 2015 Mancunian? I learned something today. I didn't know cotton was cultivated around Manchester. Cultivated? No far too cold and wet. But much of the industrial revolution was seeded in the Cotton Mills of the North West and Manchester in particular. Come to think about it much of the political revolution of the 20th century has its roots there as well; the first Cooperative Society was there, Marx and Engels met there and were massively influenced by Engels writings on Manchester Industrialization, and The Pankhurst family who were hugely important within the Brittish Suffragette movement. Link to comment Share on other sites More sharing options...
michel123456 Posted April 10, 2015 Share Posted April 10, 2015 The Beatles.... ------------- Oops, that was Liverpool Link to comment Share on other sites More sharing options...
smithjohn52 Posted April 12, 2015 Share Posted April 12, 2015 (edited) (blah, blah, blah. Speculative content by a sockpuppet of a banned user removed by mod) Edited April 12, 2015 by swansont Link to comment Share on other sites More sharing options...
Delta1212 Posted April 13, 2015 Share Posted April 13, 2015 A nice silk moire or a more chunky Harris tweed? I was led to believe it was made of rubber. 1 Link to comment Share on other sites More sharing options...
Heroprime Posted May 1, 2015 Share Posted May 1, 2015 i believe that it is a simple solution. it is dark matter plain and simple. dark matter is not just dark matter but gravity and gravity is dark matter its similar to spacetime where space and time are not seperate but one and the same.Well I had to read that last phrase three times before I got it... I don't think you can assume space-time is dark matter. First, we don't know much about dark matter and we only theorise its use. Second dark matter is supposed to be a type of matter that is undetectable and the only thing it does is have a gravitational field. Also, space time isn't something, it's the entire "volume" of our universe, it's not a flat sheet of paper. I think it's hard to explain, but it is not something, it is where everything exists. I think a good comparaison would be a game. Take a sandbox game and create a completely empty world. The world is now "space time". It's not something, it's somewhere everything else can exist. 2 Link to comment Share on other sites More sharing options...
Mordred Posted May 1, 2015 Share Posted May 1, 2015 Good answer +1 Link to comment Share on other sites More sharing options...
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