How can the universe be infinite?

Goto page Previous  1, 2, 3
View previous topic :: View next topic
Guest
  • #21
  • Posted: 08/13/2013 23:14
  • Post subject:
  • Quote
Or maybe I can reinterpret what I said and think outside the box a little more. Maybe our universe is actually extremely small. We just think it's big because we think of our universe relative to us. Maybe there are things seemingly infinitely bigger than our universe. Or maybe our universe is actually some kind of computer simulation. Maybe our universe is just somebody's snowglobe of some kind. And what do they live in? You know, the things controlling or building our simulation of whatever kind? Do they live in a universe? Or maybe something totally different? And these things... creatures or whatever... maybe their intelligence is so big, they can instantly know and understand everything that ever happened in our universe as easily as we can answer 2 + 2, which is their "normal", meaning it's not that they are really smart, it's that we aren't as special as we think of ourselves.

heh...
Guest
  • #22
  • Posted: 08/14/2013 15:02
  • Post subject:
  • Quote
The universe can only be finite if it's closed (Like a sphere or sth) because in any other scenario there will be so-called edges and because space is presupposed in our understanding of universe (and it exists because of the universe) then space is determined by extension of universe so that space is present when there is universe and because that's our boundary then it's infinite; if you don't understand this I can make it clear with an example that uses our arbitrary boundaries (which was, I think, first provided by Hawking): when you ask if universe is infinite, the question is equivalent of another more analysed question: "Is there anything beyond universe?" You may think that universe could still be finite if there wasn't anything beyond it; but that's only a mistake of grammar. Universe is all that there is and space is one of its properties (well if we're talking conventionally and not in terms of general relativity) so to say that space is finite is to say that it ends somewhere and to say that it ends somewhere requires that something else begins where it ends but universe is all that there is so nothing begins after universe so it doesn't end anywhere and anything that doesn't end and have no edges is infinite. To think otherwise is just failing to understand the meaning of words and that's just an illusion of common sense; like you wouldn't ask "what is south of the south?". If "the universe is shaped exactly like the earth, and if you go straight long enough you end up where you were" then you would know that it's finite but it isn't because it's been proved that it's flat meaning that it's expanding and it will expand infinitely just to approach a stillness as it's limit. This results have been established through observing Type Ia Supernovae and nuances in Cosmic Microwave Background radiation and calculations of space curvature in Euclidean system (presupposed geometrical system of a global geometry as opposed to local one which can be explained consistently in Minkowskian system through general relativity) which itself results in a flat universe and Nobel Prize in physics was awarded to Saul Perlmutter, Brian P. Scmidt and Adam Reiss two years ago partly for this discovery.
AlexZangari
Gender: Male

Age: 32

Location: gone
United States
  • #23
  • Posted: 08/14/2013 18:46
  • Post subject:
  • Quote
swedenman wrote:
Hm. Well, I'm not sure the best way to explain it. I'll put it this way: Imagine you have an infinite hotel with an infinite number of occupants. Now let's pretend like you have an infinite number of such hotels. Now fuse all of them together into one super-infinite hotel.

Okay, well that hotel's number of occupants would actually have the same cardinality as the number of occupants in the original hotel, but it has still "grown" in a sense.

Okay, here's a better explanation: If you have a hotel with an infinite number of occupants and one more person shows up, the hotel will "expand" or "grow" in a sense. The number of occupants will be the same as far as we're concerned, but it's also gotten "bigger".

I'm sorry if that makes no sense. The concept of "infinity" is a very ambiguous one.


Oh yeah, this sounds familiar now. Igotchu.
_________________
kill yr idols
sp4cetiger
  • #24
  • Posted: 08/20/2013 04:08
  • Post subject:
  • Quote
tekin wrote:
If "the universe is shaped exactly like the earth, and if you go straight long enough you end up where you were" then you would know that it's finite but it isn't because it's been proved that it's flat meaning that it's expanding and it will expand infinitely just to approach a stillness as it's limit. This results have been established through observing Type Ia Supernovae and nuances in Cosmic Microwave Background radiation and calculations of space curvature in Euclidean system (presupposed geometrical system of a global geometry as opposed to local one which can be explained consistently in Minkowskian system through general relativity) which itself results in a flat universe and Nobel Prize in physics was awarded to Saul Perlmutter, Brian P. Scmidt and Adam Reiss two years ago partly for this discovery.


It's true that the universe has been measured to be flat, at least to the precision we can measure right now, but inflation muddies the waters about the finite/infinite question. Also, the current model of the universe has the universe accelerating its expansion indefinitely into the future (rather than eternally decelerating). There's still a lot we don't understand about the energy components of the universe, though, so this picture could change.
Display posts from previous:   

  
Topic Posters
All times are GMT
Goto page Previous  1, 2, 3
Page 3 of 3


 

Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Similar Topics
Topic Author Forum
Space, Galaxies, Stars and the Universe. Guest Lounge
If you could live in any fictional un... Guest Lounge
The Center of the Pop Universe Listmeister Music
Mellon Collie and the Infinite Sadnes... revolver94 Music
Can't find Tricky album: Pre-Milleniu... paladisiac Suggestions

 
Back to Top