Space is a vacuum, but it is far from empty. ggg = ddd.getElementsByTagName('body')[0], Spacetime bends, warps and ripples and carries energy. xxx = www.innerWidth || eee.clientWidth || ggg.clientWidth, 'onresize' : 'resize'; document.getElementById('heightyyy').innerText = yyy; It's a naive platitude used by popular science to 'explain' general relativity, to avoid going into the mathematical details. This fabric is continuous, smooth, and gets curved and deformed by the presence of matter and energy. 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. The surface of a Euclidean sphere is curved. The fabric of space time was proposed by Albert Einstein in 1916 in his theory of General Relativity. Quality science forum, philosophy forum, and live chatroom for discussion and learning. 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, … Rather it's woven together, along with time, into a single fabric: spacetime. All are welcome, beginners and experts alike. If it was made of "nothing" it could'be bent, right? and Why does the cosmological “constant”, Lambda, have the value it has? }. So it doesn't exist? and so on. 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? Space-time is a lattice type thread particle network in space. function getum(){ 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? if(navigator.appName != "Microsoft Internet Explorer" ){ The position coordinates x, y, z are the usual three-dimensional coordinates used in classical.... See full answer below. } The only way you'd ever accelerate would be … Space is the zone above and around our planet where there is no air to breathe or to scatter light. }// The earth is a 3 dimensional Euclidean sphere. yyy = www.innerHeight || eee.clientHeight || ggg.clientHeight; and so on. The series is hosted by Greene and includes commentary by numerous other renowned physicists, such as Max Tegmark and others. (See also geometry: The real world. } The 4D spacetime continuum is perfect. function Changelineheight(new_size) The famous physicist Albert Einstein helped develop the idea of space-time as part of his theory of relativity. 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. Space-time must be made out of … 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. Spacetime is a model. //if (xxx > 420){document.getElementById('spacer').style.width = xxx - 420 + 'px';} Does it have a sense to ask what is Spacetime made of? The singular feature of Einstein’s view of gravity is its geometric nature. var www = window, 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. The particles in the universe don’t just all do their own thing; they follow a definite set of common law… What physical space itself is actually made of is of course a very interesting question. var event = window.attachEvent ? It exists. The time scale of the universe is very long compared to that for human life. The spacetime curvature around any massive object is determined by the combination of mass and distance from the center-of-mass. No one knows? What are molecules made of? 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. 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. Clarendon Laboratory Because we know: Spacetime can be bent, which results in gravity and gravitational lensing effects etc. Quality science forum, philosophy forum, and live chatroom for discussion and learning.  Wow. The particle itself would be just the grey threads in the picture (no color and a lot thinner of course). I think it has to be something. //alert(document.referrer) $\begingroup$ There is no 'fabric' of spacetime. Spacetime bends, warps and ripples and carries energy. Does it make sense to ask what it is made of? The answer is that empty spacetime (or the vacuum) is made of … 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? Weeklymisleadia say's it's a mathematical model. 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. I found an answer from astronomy.stackexchange.comgravity - What is spacetime 'made' of? But they don't talk about what the rubbery fabric is made of? Oxford In the abstract it’s far from obviousthat there should be a simple, ultimate theory of our universe. function ChangeFonttype(new_size){ Spacetime would be simple, uncurved, and would simply provide a stage for matter to move through and interact. 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. What are atoms made of? document.getElementById('whitebox').style.lineHeight = new_size; For example, the concept of spacetime (in context of the General Theory of Relativity) helps you to predict that the gravitational lensing exists. What is spacetime made of? People talk about space time like it is a rubbery fabric. if (xxx > 850){document.getElementById('gettumxxx').style.width = xxx - 280 + 'px';} 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). This “atomic” approach to the problem of quantum gravity may even throw light on the ancient philosophical question of why we experience time passing. document.getElementById('whitebox').style.fontSize = new_size+'px'; Since the beginning of the 20th Century, we have had, in addition to matter, another “something” to ask questions about: spacetime. In other words it is something that exists in human brain, to help that brain exactly predict the future experiences out of previous experiences. addEvent(event, function(){ getum(); }); Related: Newton's Laws of Motion But experimen… Is it made of energy? This four-dimensional continuum is known as Minkowski space. How Biden's plans could affect retirement finances No. 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. Parks Road document.getElementById('widthxxx').innerText = xxx; var addEvent = window.attachEvent||window.addEventListener; //document.getElementsByClassName('style1').style.fontSize = new_size+'px'; Spacetime diagrams can be used to visualize relativistic effects, such as why different observers perceive where and when events occur differently. Watch Queue Queue Does it make sense to ask what it is made of? Space-time is a mathematical model that joins space and time into a single idea called a continuum. document.getElementById('whitebox').style.fontFamily = new_size; Since the beginning of the 20th Century, we have had, if (xxx < 850){document.getElementById('gettumxxx').style.width = xxx - 70 + 'px';} Empty space is completely empty / null / void. There is no ‘background Aether’ in the physical world. //window.addEventListener('resize', function(event){ getum(); }); document.getElementById('redbox').style.fontSize = red_size+'px'; Jolie becomes trending topic after dad's pro-Trump rant. - Astronomy Stack ExchangeSpace-time is not "made" of anything, it is merely a medium or coordinate system. Watch Queue Queue. It is best to learn the math. function ChangeFontSize(new_size,red_size){ There is a big difference. Hello, I heard recently that spacetime is "granular". Leaving time aside for a minute, what exactly is "space" made of? All are welcome, beginners and experts alike. Physicists are like the annoying child who keeps asking questions: What is this piece of chalk made of? This video is unavailable. eee = ddd.documentElement, //document.getElementsByClassName('style1').style.fontSize = new_size+'px'; //if (xxx < 670){document.getElementById('formatter').style.width = xxx - 70 + 'px';} 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. if(navigator.appName != "Microsoft Internet Explorer"){}// 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. { But—as noted, for example, by early theologians—one very obvious feature of our universe is that there is order in it. I think the problem with our understanding of gravity and the relationship with the other forces is the current understanding of space time. Spacetime is made up of position and time coordinates. Does it have a weight, charge, mass, a sea of quarks, anything? So what is it made of? in addition to matter, another “something” to ask questions about: spacetime. Everything in the Universe is made from one type of thread. The particle itself would be just the grey threads (or strings) in the picture (no color and a lot thinner of course). //document.getElementsByClassName('style1').style.fontSize = new_size+'px'; ddd = document, It is known in mainstream science that all visible matter, non-visible matter, and forces in the universe are made of energy. Combining these two ideas helped cosmology to understand how the universe works on … Curved space-time and geometric gravitation. What are atoms made of? }// What are molecules made of? When events occur differently '' it could'be bent, which results in gravity and gravitational lensing effects.. 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