Notices
Results 1 to 18 of 18

Thread: The shape ot the universe

  1. #1 The shape ot the universe 
    Forum Freshman
    Join Date
    Mar 2008
    Posts
    10
    How can we ever ascertain the exact shape of our universe?


    Reply With Quote  
     

  2.  
     

  3. #2  
    Forum Bachelors Degree
    Join Date
    Mar 2008
    Location
    Canada
    Posts
    414
    we can't although I've seen a recent Astronomy magazine that describes what the shape of the Universe may be according to string theory. They had a picture on it that looked more or less like a blob with various offshoots coming off it.


    Reply With Quote  
     

  4. #3  
    Forum Freshman
    Join Date
    Mar 2008
    Posts
    10
    I recently saw a program on string theory and the talk of the possiblity of the 11 dimentions, but what id like to know is how people can base theories of other dimentions and the other universe when no can accurately put a shape to our own universe? I dont know enough about the topic as Im just a student studying in construction but the idea of the shape of our universe constantly plagues me.
    Reply With Quote  
     

  5. #4  
    Administrator KALSTER's Avatar
    Join Date
    Sep 2007
    Location
    South Africa
    Posts
    8,245
    First off, one should move away fro trying to think of the universe as having a shape in the normal sense of the word. If you hold a ball in your hand, you can see its shape only as a result of the existence of an area that is not the ball. That is, it requires an edge, as it is this edge that gives it its shape. When thinking about the universe, as described by current theory, there is no "outside" of the universe, not even emptiness (if you can make sense of that :? ). Instead, the universe behaves almost like being inside a black hole, in that when you leave earth in a straight path (at faster than light speeds), you would eventually end up back at the earth as a result of the subtle curvature of the space-time fabric. I guess if you started trips in different directions, you might eventually notice that the round trips take a different amount of time in different directions (so you traveled farther). When you put all of your aquired data together, you might then be able to see some form. The thing is that you could do this experiment from anywhere within the universe and come to the same result, weird huh? :wink:
    Disclaimer: I do not declare myself to be an expert on ANY subject. If I state something as fact that is obviously wrong, please don't hesitate to correct me. I welcome such corrections in an attempt to be as truthful and accurate as possible.

    "Gullibility kills" - Carl Sagan
    "All people know the same truth. Our lives consist of how we chose to distort it." - Harry Block
    "It is the mark of an educated mind to be able to entertain a thought without accepting it." - Aristotle
    Reply With Quote  
     

  6. #5  
    Forum Freshman
    Join Date
    Mar 2008
    Posts
    10
    wow, ive never looked at it like that. but i still feel it doesnt answer what im trying to think out. Your explaination as u said was based on a theory that if u travel in a straight line from earth you ll eventually reach earth again, so, if dats true, one can deduct that the universe is just like the ball u told me bout, round??? but as no one has ever done that journey its still a theory. so could it still be dat dere is a definte EDGE to our universe or am i just tinking like columbus's sceptics of old???
    Reply With Quote  
     

  7. #6  
    Administrator KALSTER's Avatar
    Join Date
    Sep 2007
    Location
    South Africa
    Posts
    8,245
    There are some theories that provide for an edge of sorts, where the edge is defined as the place all matter stops and where space-time itself is infinite. These theories have been discarded mostly though, as they do not account for nearly as many observed facts as the big bang theory does. One of these observations is the fact that space is expanding. So if you "reverse the clock", all matter (and indeed space itself)in the universe was once concentrated in a very small area. That is, an area as I described in my previous post as containing everything (including space-time) with no "outside" to it, only this one was maybe a singularity (an object of infinite density; zero dimensions).

    PS: I expect Cosmo will post a reply shortly, but remember that he is not expressing the commonly held consensus. :wink:
    Disclaimer: I do not declare myself to be an expert on ANY subject. If I state something as fact that is obviously wrong, please don't hesitate to correct me. I welcome such corrections in an attempt to be as truthful and accurate as possible.

    "Gullibility kills" - Carl Sagan
    "All people know the same truth. Our lives consist of how we chose to distort it." - Harry Block
    "It is the mark of an educated mind to be able to entertain a thought without accepting it." - Aristotle
    Reply With Quote  
     

  8. #7  
    Forum Freshman
    Join Date
    Mar 2008
    Posts
    10
    Tanks for sharing your thoughts, its highly intresting, another theory so. we all agree on the big bang. matter from noting etc etc. so if the particle generator in cern can provide some enlightenment on the whole matter from noting, via some kind of experment, my tinking is that if our universe started with a big bang, then could it be possible that our universe is an experiment, of sorts. thinking outside the box, could you say that our universe is so large relevant to us as human beings, but how relevant is it to the size of whats beyond it?
    Reply With Quote  
     

  9. #8  
    Administrator KALSTER's Avatar
    Join Date
    Sep 2007
    Location
    South Africa
    Posts
    8,245
    thinking outside the box, could you say that our universe is so large relevant to us as human beings, but how relevant is it to the size of whats beyond it?
    Well, the big bang theory excludes the possibility of the existence of a "beyond". If indeed the universe is infinite, as suggested by less well supported theories, that would certainly put our little observable universe to shame. :wink:
    Disclaimer: I do not declare myself to be an expert on ANY subject. If I state something as fact that is obviously wrong, please don't hesitate to correct me. I welcome such corrections in an attempt to be as truthful and accurate as possible.

    "Gullibility kills" - Carl Sagan
    "All people know the same truth. Our lives consist of how we chose to distort it." - Harry Block
    "It is the mark of an educated mind to be able to entertain a thought without accepting it." - Aristotle
    Reply With Quote  
     

  10. #9  
    Forum Freshman
    Join Date
    Mar 2008
    Posts
    10
    how do we know that noting existed before BB? i was reading other post and people were talking bout stuff before the BB and talk of matter being created 3 mins after BB and so on, i understand the idea of matter developing over time to form what is now, but i cant grasp the idea that the big bang JUST happened, and what was needed to fuel a Big Bang.
    Reply With Quote  
     

  11. #10  
    Forum Freshman antimatter54's Avatar
    Join Date
    Mar 2008
    Posts
    25
    could m-theory help in this question?
    Reply With Quote  
     

  12. #11  
    Forum Freshman
    Join Date
    Mar 2008
    Posts
    10
    Ive havent heard anything about m-theory, what does that say? I still belive dat the universe is relevant to the size of us and that for us to gauge the space that we exist in we must belive that our universe is apart of someting else, and is the size of something relevant outside our universe.
    Reply With Quote  
     

  13. #12  
    The Doctor Quantime's Avatar
    Join Date
    Jun 2007
    Location
    United Kingdom
    Posts
    4,546
    Its a saddle shape at the moment.
    "If you wish to make an apple pie from scratch, you must first invent the universe". - Carl Sagan
    Reply With Quote  
     

  14. #13  
    Forum Professor serpicojr's Avatar
    Join Date
    Jul 2007
    Location
    JRZ
    Posts
    1,069
    Care to provide some support for that statement?
    Reply With Quote  
     

  15. #14  
    Forum Sophomore
    Join Date
    Feb 2008
    Location
    Chicago Area
    Posts
    101
    Quote Originally Posted by KALSTER
    thinking outside the box, could you say that our universe is so large relevant to us as human beings, but how relevant is it to the size of whats beyond it?
    Well, the big bang theory excludes the possibility of the existence of a "beyond". If indeed the universe is infinite, as suggested by less well supported theories, that would certainly put our little observable universe to shame. :wink:
    I believe in a finite universe theory but I also believe the expansion of the universe to have infinite capability. If this is true, would it also be true to say classifying the universe as finite is only a technicality?
    .................................................. ...............
    The truth is difficult to obtain.
    They conceal it in books.
    *************************************
    Reply With Quote  
     

  16. #15  
    Forum Freshman antimatter54's Avatar
    Join Date
    Mar 2008
    Posts
    25
    the m-theory suggests that strings (from string theory) if given a great amount of energy can expand into disks (called a brain) even possibley to the size of a universe and m-theory suggests that we could be living inside one of the brians and that theres other brain universes around us which collide into each other over billions of years resulting in many big bangs
    heres a link i found to explain more
    http://en.wikipedia.org/wiki/M-theory
    trash can man :-D

    need to revenge my pride list:
    Sum1bor3d
    Sonny
    Cuntinuum
    Reply With Quote  
     

  17. #16  
    The Doctor Quantime's Avatar
    Join Date
    Jun 2007
    Location
    United Kingdom
    Posts
    4,546
    Quote Originally Posted by serpicojr
    Care to provide some support for that statement?
    Yes.
    "If you wish to make an apple pie from scratch, you must first invent the universe". - Carl Sagan
    Reply With Quote  
     

  18. #17  
    Forum Professor serpicojr's Avatar
    Join Date
    Jul 2007
    Location
    JRZ
    Posts
    1,069
    Present it.
    Reply With Quote  
     

  19. #18  
    Forum Freshman
    Join Date
    Mar 2008
    Posts
    42
    It has been speculated that the universe is like a balloon. You could take a marker and put dots on the balloon to represent say the galaxies. As you blow up the balloon the dots not only move away from one another but they also grow in size.

    My problem with this theory is that it ignores what is outside of the balloon and, moreso, what is inside of the balloon.
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •