} document.getElementById('whitebox').style.fontSize = new_size+'px'; What is spacetime made of? Space is a vacuum, but it is far from empty. function ChangeFontSize(new_size,red_size){ It is known in mainstream science that all visible matter, non-visible matter, and forces in the universe are made of energy. Does it make sense to ask what it is made of? //if (xxx > 420){document.getElementById('spacer').style.width = xxx - 420 + 'px';} function getum(){ if (xxx > 850){document.getElementById('gettumxxx').style.width = xxx - 280 + 'px';} Wow. Because we know: Spacetime can be bent, which results in gravity and gravitational lensing effects etc. Is it made of energy? No. //document.getElementsByClassName('style1').style.fontSize = new_size+'px'; Watch Queue Queue if(navigator.appName != "Microsoft Internet Explorer"){}// Quality science forum, philosophy forum, and live chatroom for discussion and learning. eee = ddd.documentElement, Spacetime is most assuredly made of something as it is not a void and, by General Relativity, shown to be inhomogeneous: curvature over here in this piece of spacetime can be different from the curvature in that piece over there, so it has position-dependent properties. Parks Road The position coordinates x, y, z are the usual three-dimensional coordinates used in classical.... See full answer below. There is a big difference. The famous physicist Albert Einstein helped develop the idea of space-time as part of his theory of relativity. Curved space-time and geometric gravitation. The singular feature of Einstein’s view of gravity is its geometric nature. Physicists are like the annoying child who keeps asking questions: What is this piece of chalk made of? Space is the zone above and around our planet where there is no air to breathe or to scatter light. What are atoms made of? Indeed, the history of physics so far might make us doubtful—because it seems as if whenever we learn more, things just get more complicated, at least in terms of the mathematical structures they involve. In the abstract it’s far from obviousthat there should be a simple, ultimate theory of our universe. if(navigator.appName != "Microsoft Internet Explorer" ){ xxx = www.innerWidth || eee.clientWidth || ggg.clientWidth, The fabric of space time was proposed by Albert Einstein in 1916 in his theory of General Relativity. and so on. if (xxx < 850){document.getElementById('gettumxxx').style.width = xxx - 70 + 'px';} Oxford var www = window, Space-time is a lattice type thread particle network in space. Spacetime is a model. //document.getElementsByClassName('style1').style.fontSize = new_size+'px'; - Astronomy Stack ExchangeSpace-time is not "made" of anything, it is merely a medium or coordinate system. In other words it is something that exists in human brain, to help that brain exactly predict the future experiences out of previous experiences. People talk about space time like it is a rubbery fabric. Space-time is a mathematical model that joins space and time into a single idea called a continuum. Your question is more correctly stated as “What is spacetime made of?” Physicists currently call empty spacetime as the vacuum, but this “space” has properties so how does it come to possess these properties? Spacetime bends, warps and ripples and carries energy. } //if (xxx < 670){document.getElementById('formatter').style.width = xxx - 70 + 'px';} ddd = document, Does it have a sense to ask what is Spacetime made of? It exists. So what is it made of? The answer is that empty spacetime (or the vacuum) is made of … This fabric is continuous, smooth, and gets curved and deformed by the presence of matter and energy. What are molecules made of? Weeklymisleadia say's it's a mathematical model. No one knows? document.getElementById('heightyyy').innerText = yyy; Does it make sense to ask what it is made of? //alert(document.referrer) Prior to his pioneering work, scientists had two separate theories to explain physical phenomena: Isaac Newton's laws of physics described the motion of massive objects, while James Clerk Maxwell's electromagnetic models explained the properties of light, according to NASA. Since the beginning of the 20th Century, we have had, in addition to matter, another “something” to ask questions about: spacetime. //window.addEventListener('resize', function(event){ getum(); }); function Changelineheight(new_size) But—as noted, for example, by early theologians—one very obvious feature of our universe is that there is order in it. Spacetime would be simple, uncurved, and would simply provide a stage for matter to move through and interact. Watch Queue Queue. Originally posted by FZ+ Yes you can, so long as you continue the analogy and see the earth as a 2 dimensional non-euclidean surface. All are welcome, beginners and experts alike. What are atoms made of? What physical space itself is actually made of is of course a very interesting question. The particles in the universe don’t just all do their own thing; they follow a definite set of common law… document.getElementById('redbox').style.fontSize = red_size+'px'; Spacetime bends, warps and ripples and carries energy. Clarendon Laboratory }. All are welcome, beginners and experts alike. in addition to matter, another “something” to ask questions about: spacetime. I will argue that it does and that the proposal that it is made of smallest possible events — literally “atoms of spacetime” — leads to new ways of thinking about some central questions in the quest to unify our understanding of gravity and quantum theory, including, What accounts for the entropy of a black hole? Related: Newton's Laws of Motion But experimen… $\begingroup$ There is no 'fabric' of spacetime. //document.getElementsByClassName('style1').style.fontSize = new_size+'px'; and so on. There is no ‘background Aether’ in the physical world. yyy = www.innerHeight || eee.clientHeight || ggg.clientHeight; ggg = ddd.getElementsByTagName('body')[0], addEvent(event, function(){ getum(); }); In physics, spacetime is any mathematical model which fuses the three dimensions of space and the one dimension of time into a single four-dimensional manifold. and Why does the cosmological “constant”, Lambda, have the value it has? document.getElementById('widthxxx').innerText = xxx; Philosophy of space and time is the branch of philosophy concerned with the issues surrounding the ontology, epistemology, and character of space and time.While such ideas have been central to philosophy from its inception, the philosophy of space and time was both an inspiration for and a central aspect of early analytic philosophy.The subject focuses on a number of basic issues, … The particle itself would be just the grey threads in the picture (no color and a lot thinner of course). (See also geometry: The real world. document.getElementById('whitebox').style.lineHeight = new_size; Since the beginning of the 20th Century, we have had, The surface of a Euclidean sphere is curved. Empty space is completely empty / null / void. Does it have a weight, charge, mass, a sea of quarks, anything? It is best to learn the math. Spacetime is made up of position and time coordinates. I think the problem with our understanding of gravity and the relationship with the other forces is the current understanding of space time. This video is unavailable. NOVA made a documentary sequel to the popular Elegant Universe adaptation based on this book The Fabric of the Cosmos and with the same name. He postulated that gravity distorts space so that objects including light from stars must follow a curved path around large bodies of gravity such as stars and black holes. How Biden's plans could affect retirement finances So it doesn't exist? The 4D spacetime continuum is perfect. But they don't talk about what the rubbery fabric is made of? What time itself is actually made of is a much easier question to answer because time itself does not objectively exist physically in the first place, as I have already discussed many many times on the forum. For example, the concept of spacetime (in context of the General Theory of Relativity) helps you to predict that the gravitational lensing exists. The earth is a 3 dimensional Euclidean sphere. READ THIS FIRST ---> one inch equation: TL = mc^2, gravitation without mass - the curve ball, Reconciliation of Gravity and Quantum Mechanics, Reconciliation of Newton - Tesla - GR - QM, NO EXPANSION - NO DARK ENERGY - NO SINGULARITIES, You are 3-D but really 1-D but really 3-D. The spacetime curvature around any massive object is determined by the combination of mass and distance from the center-of-mass. If gravity can be defined as the curvature of space rather than a force of attraction, why does not a bullet shot out of a gun, say perpendicular to the Earth's crust, and a ball thrown by me on the same trajectory (but obviously at a much slower speed) follow the same curve? { Space-time, in physical science, single concept that recognizes the union of space and time, first proposed by the mathematician Hermann Minkowski in 1908 as a way to reformulate Albert Einstein ’s special theory of relativity (1905). The only way you'd ever accelerate would be … Spacetime diagrams can be used to visualize relativistic effects, such as why different observers perceive where and when events occur differently. Combining these two ideas helped cosmology to understand how the universe works on … What are molecules made of? Everything in the Universe is made from one type of thread. var addEvent = window.attachEvent||window.addEventListener; Quality science forum, philosophy forum, and live chatroom for discussion and learning. }// 'onresize' : 'resize'; document.getElementById('whitebox').style.fontFamily = new_size; I found an answer from astronomy.stackexchange.comgravity - What is spacetime 'made' of? made exclusively by consecutive ‘billiard balls’: we cannot even imagine two geometric points along a finite spacetime interval, fixing the width of the dark strips in the drawing above, and hence talk about motion in relation to the Aether. Rather it's woven together, along with time, into a single fabric: spacetime. This four-dimensional continuum is known as Minkowski space. If it was made of "nothing" it could'be bent, right? var event = window.attachEvent ? Jolie becomes trending topic after dad's pro-Trump rant. OX1 3PU, Rudolf Peierls Centre for Theoretical Physics, Introduction to Machine learning for Physicists, Oxford Master Course in Mathematical and Theoretical Physics, © 2020 The University of Oxford Department of Physics. This “atomic” approach to the problem of quantum gravity may even throw light on the ancient philosophical question of why we experience time passing. Hello, I heard recently that spacetime is "granular".Â Leaving time aside for a minute, what exactly is "space" made of? It's a naive platitude used by popular science to 'explain' general relativity, to avoid going into the mathematical details. The particle itself would be just the grey threads (or strings) in the picture (no color and a lot thinner of course). }// I think it has to be something. Space-time must be made out of … The time scale of the universe is very long compared to that for human life. 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