What Is The Universe Expanding Into If It’s Already Infinite?

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When you bake a loaf of bread or a batch of muffins, you place the dough into a pan. As the dough bakes in the oven, it rises into the baking pan. Any chocolate chips or blueberries in the muffin batter get spread farther apart as the muffin batter rises.

The expansion of the universe bears some resemblance to this phenomenon, but it has one key difference: while dough expands out into a baking pan, the universe expands into itself alone.

It may seem mind-bending, but the term "universe" refers to the entirety of everything within it. In the context of an expanding universe, there is none, just a singular, unbound ever-spreading mass. Even if you were to consider a container or boundary, it would be part of the universe and therefore would be included in its expansion.

Those who have devoted years to studying the universe find these concepts challenging to comprehend. You won't encounter anything like this in your everyday life. It's akin to asking what direction is farther north of the North Pole.

Here's another way to think about the universe's expansion: it's all about how other galaxies are moving away from our own Milky Way galaxy. By tracking how those galaxies move away from us, scientists have conclusive proof that the universe is expanding. And they measure this expansion by tracking the rate at which other galaxies move away from us. This definition helps them visualize expansion without having to think of it as expanding into anything.

The expanding universe

Actually, it was called the Big Bang, but it was a period where the universe suddenly expanded rapidly, marking its beginning.

The universe then rapidly condensed and cooled, and it began creating matter and light. Eventually, it evolved into the universe we know today.

In 1922, he mathematically confirmed the expansion of the universe.

It was confirmed that the entire universe is expanding, and the rate at which it is expanding is increasing.

This discovery remains a mystery for astrophysicists. The process by which the universe manages to overcome the pull of gravity that holds it together and, at the same time, continues to expand by repelling objects in the universe is unclear. Furthermore, its expansion rate is accelerating over time.

Scientists often use a visual aid called the expansion funnel to illustrate how the universe's expansion has accelerated since the Big Bang. Picture a funnel with a wide opening. The left side of the funnel, or its narrow end, represents the universe's beginning. Moving towards the right signifies moving forward in time. The part of the funnel that gradually widens symbolizes the universe's expansion.

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The energy from ordinary matter, which makes up the Earth, the Sun, and everything we can see, accounts for roughly 5 percent of all energy.

Outside the expansion funnel

What lies beyond the expansion funnel?

A model that incorporates multiple universes could resolve some of the concerns scientists have with the current models of our universe.

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The quantum world is quite distinct from what we typically perceive in our everyday lives.

In our everyday experience, objects behave as we typically expect them to. Objects aren't broken up into individual units or packets, and can hold varying amounts of energy at a time. Objects aren't created or eliminated suddenly.

The quantum world operates in a binary fashion, similar to a light switch, where energy is either fully "on" or "off." In contrast, the world we perceive and engage with functions more like a dimmer switch, enabling a range of energy levels.

doesn’t support that idea.

, and many others.

No matter what, the universe will just keep expanding, and the gap between our galaxy and most others will grow further with each passing time.

, Instructor of Physics,

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