In parallel universe meaning

• Level 1: Regions Beyond Cosmic Horizon: The universe is essentially infinitely big and contains matter at roughly the same distribution as we see it throughout the universe. Matter can combine in only so many different configurations. Given an infinite amount of space, it stands to reason there exists another portion of the universe in which an exact duplicate of our world exists. • Level 2: Other Post-Inflation Bubbles: Separate universes spring up like bubbles of • Level 3: The Many Worlds of Quantum Physics: According to this approach to quantum physics, events unfold in every single possible way, just in different universes. Science fiction "alternate history" stories utilize this sort of a parallel universe model, so it's the most well-known outside of physics. • Level 4: Other Mathematical Structures: This type of parallel universes is sort of a catch-all for other mathematical structures which we can conceive of, but which we don't observe as physical realities in our universe. The Level 4 parallel universes are ones which are governed by different equations from those that govern our universe. Unlike Level 2 universes, it's not just different manifestations of the same fundamental rules, but entirely different sets of rules. • Quilted Multiverse (Level 1): Space is infinite, therefore somewhere there are regions of space that will exactly mimic our own region of space. There is another world "out there" somewhere in which everything is unfolding exactly as it unf...

What – one vast, ancient and mysterious universe isn’t enough for you? Well, as it happens, there are others. Among physicists, it’s not controversial. Our universe is but one in an unimaginably massive ocean of universes called If that concept isn’t enough to get your head around, physics describes different kinds of multiverse. The easiest one to comprehend is called the cosmological multiverse. The idea here is that the universe expanded at a mind-boggling speed in the fraction of a second after the big bang. During

Thanks to advances in technology and science, we know a lot more about our Universe today than we did a century ago. But what if we're only looking at part of the picture? There are several hypotheses in physics that suggest our Universe exists alongside multiple others, nearly identical to our own, that we can't detect. String theory is great because it could unify quantum mechanics and gravity, but to work mathematically, there must be 10 physical dimensions hidden away somewhere, as opposed to the four that we see right now. This also means that there could be a huge number of different universes tucked away too, each with varying physical laws, such as different electron masses and constants of gravity. Or as Greene puts it: "If the Universe is a loaf of bread, everything we know about takes place on one slice." So how would we know if we were living alongside these other multiverses? Well, in the case of string theory, crumbs could migrate off our slice of bread onto another one as a result of collisions, and we might be able to detect their missing energy signatures using particle accelerators like the Large Hadron Collider at CERN. An alternate hypothesis is inflation, which suggests that our Universe expanded rapidly like a bubble in the first fractions of a second after the In this case, our bubble would be floating alongside other bubbles in a cosmic sea, and that means they would interact. " Indeed, they inevitably must collide, leaving possible signatures in th...

This was prompted by a previous question I had This is a general science fiction question and not specific to any particular world. Is there a difference between a parallel universe and an alternate universe? It seems the two words are used interchangeably, but according my last question, they might be considered two different things. If they are different, what makes them different? And if they are the same, do you have any proof or anything that might back up your claim? I personally would use parallel for geometric differences and alternate for event differences. But there's no way to make everyone so disciplined. The show Sliders for example features an infinite number of universes that exist independently. The definition gets muddled because some of those universes are so similar they have nearly identical timelines. And timelines tend to noticeably change from time travel. So alternate just means different. And star trek has parallel universes AND alternate timelines. There's no universal answer and is very dependent on the specific fiction's rules They're not the same thing. Taken from the definition of A parallel universe or alternative reality is a hypothetical self-contained separate reality coexisting with one's own And from the definition of An alternative universe (also known as alternate universe or alternate reality), commonly abbreviated as AU, is a type or form of in which canonical facts of setting or characterization in the universe being explored or wri...