World

Reader’s answer: The universe is expanding, but what is it expanding? | Astronomy

Scientists and astronomers say the universe is expanding.But what is it expanding into, that is, what is beyond? The universe?
Filterun, Lisbon

Email me a new question nq@theguardian.com

Reader’s reply

What is beyond the universe? simple! All those objects that you misplaced somewhere and never looked at since. Pens, glasses, wallets, keys, phones, penknife, combs, diaries, umbrellas, handkerchiefs … you name it!

Are people aware that all the space around them is filled with small wormholes, where these objects sink and are never seen by the human eye? Firmly Dirac

The universe is still in the blast stage and is a clown balloon that is about to be shaped into a sausage dog. James

As a teacher, this is a common question in my physics class. Part of the problem is one of the perspectives. The human brain works best when thinking about things in as few dimensions as possible. Shrink the curved, rugged surface of the Earth into a two-dimensional map, or reduce a two-dimensional road into a one-dimensional system such as a road number or mile marker.

Our minds cannot intuitively imagine what the universe really looks like. You can see that the balloon is inflated and inflated into the air around it. I think the universe is doing the same. This is incorrect. As long as we have evidence, the universe does not expand to anything because it is everything that exists. In other words, there is nothing outside the universe.

It is often thought that the Big Bang is happening in the universe at the center of the universe, but this is only partially true.What really happened is the big bang is The universe. It wasn’t an explosion in space. The universe is an explosion. Since then, the space between objects has expanded. The fact that this is immeasurable should make it even more amazing. Andrew Bush

Rather than thinking of the universe as inflating like a balloon, I think it’s a giant dough ball that some chefs stretch out in all directions. Therefore, the dough always remains at the original starting point. And so I’m hungry. Eva_Brick

The question begins with the false assumption that the universe has a boundary between the “universe” and the “non-universe” as the “edge”.

Everything we know, and this is what we mean by the expansion of the universe, on average, all galaxies are getting farther and farther from all other galaxies, and there is no center point. This does not mean that space-time “stretches” like a rubber sheet at any regional level (a common misconception), nor does it mean that stars and galaxies cannot yet jump into each other on a regional scale.

The problem with your question is that you are imagining something from your experience-for example, an inflated balloon-and ask what looks reasonable: “What’s outside the balloon?” From the perspective of being outside the balloon and knowing that it is a balloon.

Imagine this instead. You are a cat and you are in a flat. You have never been out. So, as far as you know, there is nothing outside the flat. Imagine you are shrinking now. From your cat’s point of view, you keep the same size, but all the walls and furniture appear to be moving far from you-your universe is expanding. But you wouldn’t ask: “Where is it expanding?” Because as far as you know, and as far as you can know, flat is everything there, and it’s It’s just spreading (perhaps the only thing you can observe does it, so that’s what Flat does). That’s our position and why the question doesn’t make sense. HaveYouFedTheFish

Since the universe is everything (as far as we know), it doesn’t make sense to say “what it expands to”. That’s everything. The big bang happened “everywhere” at the same time. Is it infinite or finite? I do not know. Even if it is finite, it may not have an “edge”. Currently, there are many unanswered or unanswered questions. All our measurements are constrained to the observable universe, so we may never know. csjjl1

Just because we don’t understand something doesn’t mean that it must be a work of some supernatural being. It’s ridiculous. There is a limit to what the human brain can understand-it is constrained by its evolutionary context. It is simply unacceptable to explain what we cannot move our heads by evoking the divinity that lives in the clouds. Well, it may be accepted by some people, but not by me. Oh, and the universe is expanding in itself. Firebird V

My theory is that the universe must expand to contain it Brian CoxSelf-satisfaction. DonerCard

According to Men in Black, we are in a big marble thrown by an alien. Indeed, it does not explain how marble is expanding. AleYarse

Has anyone noticed that this thread is expanding? What I want to know is what it is expanding into. Plovdiv12

We call the origin of the universe the Big Bang event. This is the point where new time and space have begun to develop the universe from our standard frame. It is located about 90 billion light-years * in all directions of the universe 13.8 billion years ago. This counterintuitive observation is due to the fact that new time and space are continuously created within the singularity ** everywhere at once. The origin of the universe has receded beyond our observable horizon. Note that all other points in the universe share similar observed reference frames ***.

There is no such thing as the “outside” of our singularity universe, but there is no reason why an infinite number of singularities could not exist, and each has its own space-time universe that evolves continuously. Please remember.

The mainstream cosmology is the opinion that new time and space will continue to evolve within the singularity forever. As the static mass diffuses more and more and the energy undergoes continuous entropy, the universe gradually becomes colder and darker (“Big Rip” theory).

* The “observable” edge of the universe is about 46.6 billion light-years in all directions. The far more speculative distance to the Big Bang event is probably about 90 billion light-years in all directions.

** Most cosmologists believe that the universe did not begin as a “mathematical singularity”, but as a better description of it as being very small and dense. Stephen Hawking has shown that no information has been created yet, so nothing can be learned about the origin of the universe until at least 10⁻³² seconds have passed.

*** The same frame of reference that all points in the universe observe themselves as the oldest, most central, and farthest points from the Big Bang event compared to other points within the entire singularity. Sharing. Even though new time and space are constantly evolving our universe, it retains the singularity of our origin. Chris Ducey

I think Professor Harvey Keitel said it best on Mean Streets when considering eternal spiritual life, the universe, and all the meanings. dylan37

We say “the universe is expanding” because it sounds arrogant to be able to see from the part that seems to be away from a certain point. Hemodroid

It’s not “away from a particular point”, but rather all The points are extended from all other points. Therefore, it is not arrogant at all. Our place in the universe, like all other places, is as unobtrusive and unobtrusive. Readout_Noise

I think it helps to realize the inseparable relationship between things and the physical dimensions of space and time. Measuring space involves examining the distance between objects, and measuring time involves examining the relative movement of objects. If you have completely empty space, you cannot measure space or time. So, in that sense, an empty area of ​​the universe doesn’t really exist before something moves there. Shortordercook

Einstein once said that people thought that taking everything out of space would leave space and time. The theory of relativity says that space-time comes out with things. SidneyLotterby

42. PunkyRooster (and Percival)

Hey, you beat me on it! It’s unfair! Neriev

A joke that a quantum physicist might explain, I said 42 before either of you. And then at the same time, but elsewhere. Some kind … Florton66

Reader’s answer: The universe is expanding, but what is it expanding? | Astronomy

Source link Reader’s answer: The universe is expanding, but what is it expanding? | Astronomy

Back to top button