Universe

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Introduction

The Universe is all of space and time and their contents, including planets, stars, galaxies, all forms of matter and energy. Due to the unknown spatial size of the universe (as it is ever expanding), it is unknown what it's true size is. The observable universe is currently estimated to be 93 billion light-years in diameter. In certain cosmologies, there can be many universes casually disconnected to form a greater whole called a multiverse, which similarly comprises all of space and time and its contents; though it should be noted universe can have two meanings. One is the single space-time continuum apart of a larger multiverse, the other is the totality of a cosmology. The term "verse" is used to simply say "the universe of a fictional series", for example the "Zelda verse" is referring to the "Universe of the Legend of Zelda" series.

Universe-sized Realms Guidelines

It is common for fictional characters to be scaled based on creating one or multiple "Worlds", "Dimensions", or "Realms". However, many users may often be confused on whether those are synonyms of universes or simply pocket realities. They may have indications of being quite large, the normal requirements for these to be a universe are the following (do note that a single one of these requirements works):

• These are notes that the worlds are indeed universes; while they don't need all of these, at least one of them should indicate this.
  • If they are outright called universes or stated to be the size of universes by a reliable source, they should be considered universes.
  • If they're called an alternate dimension, world, or realm in relation to the current setting the character's in with no contradictions and is not stated or shown to be a pocket realm/pocket reality.
  • If they are outright stated to be completely separated by the barriers of time and space or either stated or shown to be reasonable in size, such as having countless galaxies, then they should indeed be universes.
  • If they're flat out stated to be entire timelines, then they are indeed alternate universes.
  • Being labeled as an "Alternate Realities" indicates them being alternate universes.
  • If they're stated to mirror "The Universe" or "Our Universe" or "The Real World", they would refer to being universes.
  • Being called an alternate world with a starry sky may qualify as being a universe, however if it is a pocket dimension then it will be considered a Multi-Solar System sized pocket reality.
  • Having multiple galaxies within it should qualify.

• The following cannot be used to prove an alternate realm is a universe:
  • A realm having time that works somewhat differently is not enough to be considered a Universe as nonlinear time within a single universe exists.
  • The Worlds being different bodies of space is not enough to consider them universes, as that does not quite prove they have different timelines. Especially if they are afterlives. Afterlives often are different bodies of space, but are generally condensed in the same timeline unless there's more proof otherwise.
  • Unreliable sources calling something an alternate reality.
  • Someone calling something a parallel world to a pocket dimension that hasn't been proven to be universal in size.

Note: The reason we allow the term "parallel worlds" to be considered alternate universe is that it is a noticeable constant in fiction to define an alternate universe (also in real life) and to expect an author that has already predefined an area as a "parallel world" to come in later an call it a universe is very unreasonable. If there are no contradictions into the case, then a parallel world not established as a pocket reality or a pocket dimension can be considered a universe.

Note 2: It should also be self-evident that context matters greatly, a person could indeed be calling something an alternate universe but in their cosmology universes are incredibly small. Obviously this isn't the regular case or assumed case but it can exist, so be sure to look out for this.

Big Bang/Big Crunch/Big Rip

Big Bang

"The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now (and it could still be stretching)." - NASA

With the big bang a common occurrence is to tier a character 2-C due to "tanking" a big bang. However, the idea that the big bang was a massive explosion that thrusted all of matter into existence is a huge misconception. In reality, all matter in the universe had already existed in the form of a singularity, the big bang was simply an event that caused the expansion of space itself. There is no tier to "tanking" an expansion of space as there's nothing truly being tanked along with the concept of surface area further messing with a big bang feat as one only "tanks" a small portion of the energy expansion. The big bang should only ever truly scale to durability if the fiction in question treats the feat as a tanking feat and if the character was in the epicenter of said expansion. Otherwise their durability should be placed at Unknown or whatever their durability was already listed as.

This also doubles for creating a big bang or having energy comparable to the force of one, the expansion of space is thought to be caused by dark energy, which is something we understand very little about. A big bang does not create matter or move celestial bodies, but instead it causes the expansion of space between them, something that continues infinitely into the future assuming that the universe has a flat curvature (which ours does with an extremely small margin of error). Thus causing a big bang should be listed as Unknown unless the verse explicitly treats such an event as an ability with 2-C potency. This is of course assuming that one only caused the big bang, if one created the singularity that existed before the big bang and caused the big bang itself, then this can constitute as a 2-C feat since the feat is creating all of the matter in the universe. Regardless, big bang causation would be very potent spatial hax as it causes an infinitely accelerating expansion of space that permeates the entire universe.

Big Crunch

"The ‘Big Crunch’ is the rather fanciful name given to one of the possible fates of the Universe. In this scenario, the current expansion of the Universe ultimately slows, stops and then reverses to begin contracting. In a time-reversed version of the Big Bang, the contraction eventually compresses the whole of spacetime (and all the matter within it) into a single small region. For the Universe to end in a Big Crunch it must have sufficient mass to halt and reverse the current expansion. In other words, the density of the Universe must exceed the critical density. Astronomers express this requirement as Ω0 > 1, where Ω0 is the density parameter." - The SAO Encyclopedia of Astronomy

Surviving a Big Crunch would be an actual durability feat than "surviving" a Big Bang. The latter involves energy spreading in all directions, so even if one "survives" it, they'd only catch a portion of the energy. However, the former has all of the energy directly concentrated onto one in one point as a singularity.

Big Rip

"The Big Rip is what happens when the repulsive force of dark energy is able to overcome gravitation (and everything else). Bodies that are gravitationally bound (such as our local supercluster, our own Milky Way galaxy, our solar system, and eventually ourselves) become ripped apart and all that is left is (probably) lonesome patches of vacuum." - Phys.org