Nov 19, 2021 · On Earth, a latitude, longitude, and an altitude fixes the location of a moving aircraft or orbiting spacecraft. To locate a place in space and time, you need a fourth coordinate, a when. If you
Jul 29, 2017 · Here is his answer: "No, there would be no copy of you, even with an infinite universe. Those who have answered by saying that there must be an infinite number of copies of you are flatly mistaken. If space is infinite, then the possible arrangements of matter within it is also infinite. The space between galaxies can be rearranged in an
You can spread a finite amount of energy throughout an infinite universe. An easy example is a charged spherical shell of radius R=1m, charge Q=1 Coulomb, and mass M=1kg. The field is Q / ( 4 π ϵ 0 r 2) outside the sphere so the field has an energy density of ϵ 0 2 ( Q 4 π ϵ 0 r 2) 2 outside the sphere. So the energy of the field is. Which
Jan 8, 2015 · Consider a static universe theory where, by one of its hypothesis, universe should have infinite number of stars and such a universe has no beginning. Now, we would like to measure (by whatever means) the average distance of stars in such a universe. Just measure the amount of light/radiation at a certain point in such a universe.
Feb 16, 2023 · There are also unresolved questions in QFT related to infinity. For example, you run into an infinite "zero point energy" when constructing the Hamiltonian for a simple free scalar field theory. This implies an infinite energy density of free space. We don't observe this, and this problem is referred to as the cosmological constant problem.
Apr 21, 2019 · I think most people would say the Universe is infinite, and the number of ways of arranging infinite particles in infinite space is infinite. But we know the "visible" Universe is finite, there is a cosmic horizon. And at some point most of the matter in the Universe will cross this horizon and the information would be smeared on this horizon
Jan 11, 2022 · Another question is whether our Universe is spatially finite or infinite. I think we can never know. It could be finite but of a size that is arbitrarily large. But to many people the idea of a finite Universe immediately raises the question of what is beyond. There is no beyond — the Universe is everything there is.
Apr 7, 2023 · The only hope for a multiverse that contains any “copies” of you at all — much less an infinite number of them, à la Everything Everywhere All At Once — is if the universe itself were
However, there are also physical limits to what can be infinite in the universe. For example, the speed of light is a fundamental limit in the universe, and there cannot be anything that travels faster than it.
Jan 7, 2019 · If the universe is infinite and the curvature changes over time, then the universe is hyperbolic (since it cannot remain flat while the curvature changes). The main point though remains that the universe cannot start finite and then become infinite due to inflation or whatever. So there is no difference in energy. $\endgroup$ –
Mar 17, 2022 · A third event at time second etc. Then, mathematically we have an infinite sequence of events within second. But, you cannot do this physically. You might argue that there is no limit to how quickly the events can happen one after the other. Whatever limit anyone specifies you might be able to do better.
Apr 28, 2021 · There is nothing that says there’s anything “real” or “actual” about it, any more than there is about the abstract mathematical statement 2 + 2 = 4. Is the Universe Inevitable for Us? There are an infinite number of possible programs that one can abstractly define.
Apr 24, 2012 · And while our universe may look as if it has a beginning, the multiverse need not have a beginning. Then there is the idea of an emergent universe which exists as a kind of seed for eternity and
Jul 26, 2012 · 3) There are 170 billion galaxies in the observable universe. so there are a lot of supermassive black holes at the center of each of those galaxies. So that's a lot of real sucking, i.e
Observable Universe as a function of time and distance, in context of the expanding Universe. The universe's size is unknown, and it may be infinite in extent. Some parts of the universe are too far away for the light emitted since the Big Bang to have had enough time to reach Earth or space-based instruments, and therefore lie outside the observable universe.
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