Discussion Do you think the universe is infinite or finite and do you think something came into existence from nothing or there always been something

[Darkover]

Do you think the universe is infinite or finite and do you think something came into existence from nothing or there always been something

If the universe were truly infinite, you'd expect an infinite depth to everything—including matter itself—rather than particles having a smallest possible size. The existence of fundamental particles like quarks and electrons, which don't appear to have any smaller internal structure, suggests a limit to how small things can get.

This idea could extend to space itself—if space were infinitely divisible, there wouldn't be a smallest possible unit of distance, yet theories like quantum mechanics and Planck length suggest there is a fundamental limit. If there's a smallest scale, it makes sense to question whether there's also a largest scale, meaning the universe might be finite.

1. Infinite Universes
If space-time goes on forever, then it must start repeating at some point, because there are a finite number of ways particles can be arranged in space and time. So if you look far enough, you would encounter another version of you— in fact, infinite versions of you. Some of these twins will be doing exactly what you're doing right now, while others will have worn a different sweater this morning, and still others will have made vastly different career and life choices. Because the observable universe extends only as far as light has had a chance to get in the 13.7 billion years since the Big Bang, the space-time beyond that distance can be considered to be its own separate universe. In this way, a multitude of universes exists next to each other in a giant patchwork quilt of universes.

 

[EvisceratedJester]

Idk. All I know is that the universe is shaped like a delicious pizza pie, with each galaxy acting as a representation of a single unit of shredded cheese, together stretching far and wide.

 

[Namelesa]

Idk. All I know is that the universe is shaped like a delicious pizza pie, with each galaxy acting as a representation of a single unit of shredded cheese, together stretching far and wide.

You are telling me the universe is like a pizza? OH GOD GET ME OUT OF HERE.

 

[EvisceratedJester]

You are telling me the universe is like a pizza? OH GOD GET ME OUT OF HERE.

I mean, I don't know for sure but my dad tells me that it could be the case and that I should strive to fulfill my goal of getting to the bottom of this. My mom tells me that she can't believe that she waited nine months only to give birth to a disappointment. I tell myself that she should be thankful to have given birth to the person who will, once and for all, answer the question of whether or not our universe is just a giant pizza.

 

[Kbeau]

How or why anything exists at all just baffles me!!

 

[Forever Sleep]

Personally speaking with no science to back it up, I feel like something or other always existed and will always exist in some form or other. It just feels like there's too much stuff, too much energy to come from nothing and return to nothing.

 

[SVEN]

You are telling me the universe is like a pizza? OH GOD GET ME OUT OF HERE.

That's what you get for trusting a Jester. (and the moon is just a slice of cheese on the pizza).
Did something come out of nothing, eh .... like, in the beginning there was nothing, then it exploded in a big bang and made everything.
Brain hurting now.

 

[EvisceratedJester]

That's what you get for trusting a Jester. (and the moon is just a slice of cheese on the pizza).
Did something come out of nothing, eh .... like, in the beginning there was nothing, then it exploded in a big bang and made everything.
Brain hurting now.

No, I actually suspect that the moon might be a slice of pepperoni.

 

[SVEN]

The suspicion of a Jester ... now, that is a dark and devious pit of darkness from which may emerge imaginations beyond human comprehension. Lovecraft would have been so envious.

 

[yxmux]

Generally speaking, infinity is a mathematical concept, not a physical one. Personally, the model that makes the most sense to me is the universe having spherical geometry with its diameter equal to that of the observable universe. This would mean that every point in the universe would each have an observable boundary of the same diameter and same "contents" while also being consistent with how much the universe has expanded. Apparently it's been shown that the lower bound of the diameter of the universe is 23 trillion light-years if we assume it's closed and we're measuring this correctly, so I guess I'm wrong. I don't know. The concept of a universe beyond the observable boundary is generally not very well-defined in physics.

I think the genesis of the universe is likely related to some weird consequence of quantum fluctuations or at least something related to quantum mechanics.

This idea could extend to space itself—if space were infinitely divisible, there wouldn't be a smallest possible unit of distance, yet theories like quantum mechanics and Planck length suggest there is a fundamental limit. If there's a smallest scale, it makes sense to question whether there's also a largest scale, meaning the universe might be finite.

Spacetime is infinitely divisible since it's continuous everywhere. The Planck length is not an atomic unit of measurement like a kind of "pixel." It is simply the scale where none of our models of physics are able to make sense of.

 

[SuicideBooth]

Do you think the universe is infinite or finite and do you think something came into existence from nothing or there always been something

If the universe were truly infinite, you'd expect an infinite depth to everything—including matter itself—rather than particles having a smallest possible size. The existence of fundamental particles like quarks and electrons, which don't appear to have any smaller internal structure, suggests a limit to how small things can get.

This idea could extend to space itself—if space were infinitely divisible, there wouldn't be a smallest possible unit of distance, yet theories like quantum mechanics and Planck length suggest there is a fundamental limit. If there's a smallest scale, it makes sense to question whether there's also a largest scale, meaning the universe might be finite.

1. Infinite Universes
If space-time goes on forever, then it must start repeating at some point, because there are a finite number of ways particles can be arranged in space and time. So if you look far enough, you would encounter another version of you— in fact, infinite versions of you. Some of these twins will be doing exactly what you're doing right now, while others will have worn a different sweater this morning, and still others will have made vastly different career and life choices. Because the observable universe extends only as far as light has had a chance to get in the 13.7 billion years since the Big Bang, the space-time beyond that distance can be considered to be its own separate universe. In this way, a multitude of universes exists next to each other in a giant patchwork quilt of universes.

The first question I ask is what is nothing? Or rather, what do you mean by nothing?
There has to be something even if it is just energy, but where did the energy come from and how did it accumulate in one place to create the universe?
Transposing Einstein's E=mc² to m=E/c² you will need a lot of energy to create a small amount of mass. If you think of the small amount of mass used to release the energy in say a nuclear power station or bomb, the inverse would be needed to create mass from energy.