2 hours ago. The surface of the torus is also spatially flat, but it is finite. So you have two possibilities for a flat Universe: one infinite, like a plane, and one finite, like a torus, which is also flat. ESA: ‘Flat' seems to have a different meaning to non-scientists. By 'flat' we understand to be like a table, which has width. In fact, every line of longitude intersects at two points: the north and south poles. These Planck measurements indicate that it could be “closed”, or spherical, which would mean that if you travelled far enough in one direction, you would end up back where you started.Nov 4, 2019 Содержание the right mass density that it will neither expand forever like a cylinder nor collapse back on itself like a sphere If the density is more than the critical density, the universe is closed and curves like a sphere; if less, it will curve like a saddle. When ancient people looked to the horizon they believed the Earth was flat. We’re going to go over how you can do this easily. The BTS Universe or Bangtan Universe (often shortened to BU; 방탄소년단 세계관), initially known as The Most Beautiful Moment in Life Series, Hwa Yang Yeon Hwa Series or HYYH Series until the official name and logo were first used in 2017, is an original story that is centered on a series of music videos and short films, independently produced by HYBE and Big Hit … According to these observations, the universe is 41 times more likely to be closed than flat. When cosmologists say that the universe is flat they are referring to space—the nowverse and its parallel siblings of time past. This doesn’t mean that the universe is a big ball, these are just ways for us to understand the complexity of 4-dimensional geometry using something we are familiar with. The origins of that debate owe greatly to one man - Bernhard Riemann. Even if this answer suggests that both constructs are equivalent, there's a subtle difference between both for(;;) and while(1) (which both create infinite loops) in the C language (and possibly compiler-dependent).. It means that if you made a slice through space at a fixed moment in time and tried to draw a triangle on a really huge scale (millions of light-years across), it wouldn’t be a proper, two-dimensional triangle. The sentence "the universe is flat" really means "geometry of space is euclidean", that means: parallel straight lines never intersect, sum of angl... ... and the weakness of the gravitational pull will mean it expands forever. Often people are confused by the term conformally flat and mistake it for flat (e.g. If you mean the integral of the stress-energy tensor, yes, the exact numerical value might depend on your choice of coordinates (although in the simplest closed universe, the FRW one, the natural symmetry of the spacetime picks out a particular foliation by spacelike hypersurfaces that leads to the standard FRW coordinates), but it will be positive no matter … Let's simplify this by looking at the two-dimensional case. Take a piece of paper, and cut it into uniform, perfectly square pieces. Now pick a sur... %3E Q: What does it mean that "The Universe Is Flat?" A: It means that if you make a huge triangle, it behaves like the triangles you were taught i... The short answer to this question is that the Universe cannot be both flat and closed. Is The Universe Flat? And the displayed time is a really small number. Shapes universe could have take after big bang, depended on value of its relative density ( %3E1 , %3C1 or =1). The value of relative density turne... Finally, a third way to go about it, is to notice that for all the values of k, if we look at r → 0 , we get locally flat universe by taylor expanding 1 1 − k r 2 ≈ 1 + 0 ( r). The reason is the same reason that you can’t “peel” a sphere and lay it … $\begingroup$ Okay right, "local curvature" doesn't make sense here since homogeneous and isotropic implies constant curvature. I am not sure why the character "小" (small) is used here. Flat universes. But our universe seems to fit in neither camp. What does "flat" mean and does that refute Einstein’s contention that the universe is "curved"? A geometrically flat universe will just keep on expanding forever, while a "closed" one will eventually pull back in on itself, leading to the reverse of … A finite universe could have an edge or boundary. It is an Italian-Americanised mispronunciation of the phrase, which is considered as “Va’a fare in culo,” and it is literally “go do it in the ass” that are often shortened to “vaffanculo,” or the word are just a “fongool.” ( Λ is the Greek letter for lambda , denoting dark energy.) Since we are pretty much certain the Universe is flat, the chances of it being closed instead are correspondingly small. You feel controlled by the person who is dying. k c^2/a^2 is very, very tiny, where a(t) is the scale factor) that it resembles a flat universe. If this were the case, irrespective of the original geometry of the Universe, it would appear flat to us. Dr Dwight Turner, UKCP Psychotherapist (opens in new tab) says, "When we are more busy, then we either dream less or our dreams take on more of our daily life. "The experience of dreaming differs depending upon the stage of life we are going through." In cosmology, "flat universe" means that space is flat, not spacetime. Space is the three-dimensional hypersurface that results when cosmic time is held fixed. The spacetime metric induces a spatial metric on this three-dimensional hypersurface. Our universe is obviously not flat as it contains matter. If it's flat then you have to start asking "what's outside of it, or why does 'outside of it' not make sense?" a … For example, we dream of our boss at work, or the person we saw on the train during our daily commute, or we … How does it relate to whether the universe will recollapse, or never stop expanding, or expand at … If you've studied non-Euclidean geometry, you'll know that a triangle can have more or less than 180°, depending on the surface its drawn on. What does that time mean? Is there any difference between "小炒牛肉" and "炒牛肉"? In a hypertorus model of the Universe, motion in a straight line will return you to your original … [+] location, even in an uncurved (flat) spacetime. Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site Featured Image Credit: Memegenerator.net. The authors reanalyzed a major cosmological data set and concluded that the data favors a closed universe with 99% certainty … My answer to this question would be, yes and no. It depends on whom you ask and what you mean by "flat". A General relativist's definition of a fla... (A finite but unbounded universe is typically referred to as a ‘closed’ universe.) There's also a Goldilocks scenario for the universe, which scientists say is the most plausible. If the universe is homogeneous and isotropic then the curvature of the universe must be constant and the same throughout space. It is hard to imagi... One of the consequences of Einstein’s theory of general relativity is that space may be curved or flat depending upon a number we will call omega. What is the shape of the Universe? A provocative paper published today in the journal Nature Astronomy argues that the universe may curve around and close in on itself like a sphere, rather than lying flat like a sheet of paper as the standard theory of cosmology predicts. By definition, we call flat universes the universes with this spatial component, this spatial behaviour. The universe is flat as a pancake, and we don't understand why. Despite being 3 inches wide, it expands from no curved lines to upwards – regardless of strength. By flat, I believe, scientists usually are talking about geometries (open, closed, flat) They aren't talking about it being 2d but more like which... We Live in a Flat Universe. January 3, 2017 Mike. Cosmologists generally agree that our universe is flat. But how exactly can that be for our 3-dimensional selves and everything else for that matter? Well, first it’s useful to note that the flatness is a property of geometry, and not topology. Some compilers (Windriver DIABData for instance) complain about "condition is always true" when using while(1).. Changing to for(;;) allows to get rid of the … After The Largest Extinction Event on Earth, These Animals Were The First to Recover. It means it is a universe that has no matter (neither mass not energy) in it. But to say our universe is flat and leave it there would be irresponsible – it’s not quite that simple. It's behavior, the way it behaves. It sure feels like 3-dimensions. All other cosmological data suggests the universe is flat, meaning it has no curvature, similar to a sheet of paper. SPACE. My guess is E stand for Exponential and -5 is the power it is raised to. This is a very subconscious cry for help.If someone in real life is controlling you to the point where you feel helpless, then dreaming about them dying is a passive way out for you.. Dreaming that they are dying doesn’t mean you want them dead, it is just that you need to escape from their controlling ways. Zero curvature (flat); a drawn triangle's angles add up to 180° and the Pythagorean theorem holds; such 3-dimensional space is locally … If the universe is indeed flat then that means we have a different set of questions that need answers than if they universe is curved. The universe (Latin: universus) is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.The Big Bang theory is the prevailing cosmological description of the development of the universe. The curvature is a quantity describing how the geometry of a space differs locally from the one of the flat space.The curvature of any locally isotropic space (and hence of a locally isotropic universe) falls into one of the three following cases: . The idea that the Universe is flat means that the Pythagorean theorem holds up for spatial coordinates. We say that the universe is flat, and this means that parallel lines will always remain parallel. 90-degree turns behave as true 90-degree turns, and everything makes sense. But what are the implications for the entire universe? What does this tell us? Unfortunately, the biggest thing is what it doesn't tell us. It means that the simplest large-scale topology that accounts for the observed far-field CMB observations has no intrinsic curvature …. though, loc... It means that the space time of the universe would not have any overall curvature. (Due to General Relativity, it does definitely have local region... one of the main pointers to the era of the very rapid expansion of the universe, I tried searching Wikipedia for E and maths but found the e mathematical constant. So, the universe is as flat as a piece of chalk. I found this quote in a science internet site, “If we look beyond our edge of perception it’s possible the universe is a sphere. From this perspective, the fact that $\Omega_k$ is very small could indicate $2$ things: either the universe is infinite (and flat), or the universe … A flat universe is a universe where your good old high-school math works as expected: the angles of a triangle sum up to π radians (180 degrees), the circumference of a circle is π times its diameter, parallel lines never meet, etc. In a curved space, you can get more or less than 180 degrees, depending on how space is warped. “This is the most precise cosmological data and … It … The result of their observations is that the universe appears to be mostly flat--to within 0.4% margin. So, we must first delve into what scientist mean by “flat” and how they came to such a conclusion. According to this theory, the Universe underwent exponential expansion about 10 -30 seconds after the Big Bang. What does this even mean, and how do we know it’s true?Support us at: http:/... Cosmologists tell us that the Universe is flat. No. Imagine being submersed mid ocean. You can only see 100m in all directions (your observable universe). You cannot deduce what the shape of the... The result was that something of the size of an atom expanded to the size of the solar system by the end of the inflationary epoch. According to this theory, space and time emerged together 13.787 ± 0.020 billion years ago, and the universe has been expanding … When scientists say the universe is flat, it doesn’t necessarily mean it resembles an infinitely-expanding sheet of paper. Some scientists say there’s a chance that the universe is a sphere.”. Life literally finds a way! September 2000. #2 is totally correct - when we say the universe is flat it is not in the same sense that a piece of paper is flat, but rather means that the geometry of the universe is such that parallel lines will never cross, the angles in a triangle will always add up to 180 degress, and the corners of … In the early stage of the universe, such collisions were very common which brought order into the motions of bodies we see today. Fongool – Now, you have to understand the word fongool, which is famous. A flat universe is a key piece of the standard cosmological model, also known as the Lambda cold dark matter (ΛCDM) model. The Universe could also be closed and positively curved: like a hypersphere. But regardless, a sufficiently small ball of any smooth manifold will be as flat as you like. Answer (1 of 7): The nature of something is the knowledge of how the thing in question acts, reacts, enfolds, unfolds. We can all agree the Earth isn't flat (I hope! What this does is take smaller commits and combine them into larger ones, which could be useful if you’re wrapping up the day’s work or if you just want to package your changes differently. ), but the shape of the Universe is an important question in modern cosmology. So don't get confused, that for small k we have flat universe. What does it mean for the universe to be globally flat, What does it mean for the universe to be globally flat, spherical or hyperbolic? Spacetime is not flat. On large scales, the universe is flat, which means that if you pick 3 distant points, and draw a triangle connecting them (say by sending light beams from one vertex to another), when you add up the angles, you'll get 180 degrees. Then, even if the universe is not described by the k=0 model, today it is so large (i.e.

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