Can the universe be like a circle? where it just loops rather than end?

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  • YKhan
    Lv 7
    4 weeks ago

    It is a possibility. It's what's known as a "closed" universe, meaning it loops back in on itself, meaning that it has no ends, it just keeps going around and around. However, if it is such a universe, it would have to be doing that at a scale so large, that it's not even noticeable within our observable portion of it. The current size of the observable universe is about 42 billion light-years radius all around us. We've been attempting to measure the curve of the universe all around us, and so far most of our measurements suggest that it is mostly flat.

  • 4 weeks ago

    I think the centrifugal forces and centripetal forces that keep the whole universe in circular motion.

  • 4 weeks ago

    That's a theory - that there's a big bang, and expansion up to a point, then, it all falls back together to start once again...  Right now, it doesn't *look* like that happens, as the expansion we see isn't slowing down - it's speeding up. 

  • 4 weeks ago

    Yes that is what it's like.

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  • 4 weeks ago

    That is what many scientists believe, including Einstein. We live in the 3D surface of a 4D hypersphere. Our 3D space is finite but has no boundary.

  • 4 weeks ago

    No. A circle is flat. It has only 2 dimensions, radius and circumference. It has ZERO volume Atoms have 3  spatial dimensions. So do quarks. The Universe, the SPACE and VOLUME of the Universe is expanding, SLOWLY. We DO NOT KNOW what the SHAPE of the Universe is. It may be changing constantly. ALL we know is that the Universe is finite and MATHEMATICALLY "flat" in at least 3 spatial dimensions and 1 temporal dimension. 

  • 4 weeks ago

    A lot of possibilities and theories. a circle would have to be sphere given the spatial dimensions but doesn't seem to have any boundaries. If such limits exist, they are so far out there, it is beyond the scope of imagination. What we know of it, is one huge space with billions of galaxies so far separated that distance is mind staggering.

    My own notion is simply an infinite void with lord knows how many universes like ours may be out there. Too far distant to even see. Hubble has discovered galaxies some 39 billion light years distant and the limit of detected CMBR. What may be beyond that is just more universe.

  • Pearl
    Lv 7
    4 weeks ago

    anything is possible

  • 4 weeks ago

    There are several other models:

    1. Torus which is the shape of a donut.

    2. Kline container (which has no "inside" or "outside").

    While the "static universe" model is not currently the popular model, it can not be entirely ruled out. The string universe model I think is still in the running.

    Given the size of the universe and our knowledge base is very limited. If it did loop we would not know we were seeing ourselves if we did or could.

    • daniel g
      Lv 7
      4 weeks agoReport

      But the models are a human construct and subject to flaw.

  • Nyx
    Lv 7
    4 weeks ago

    Nope. Current evidence shows that the universe will continue expanding outward, until there's nothing left to make more stuff with.

    It's called the heat death, or entropy.

    https://www.universetoday.com/tag/heat-death/

    https://web.calpoly.edu/~rbrown/entropy.html

    • neb
      Lv 7
      4 weeks agoReport

      They are undergoing redshift. How do you think the expansion and accelerated expansion of the universe was determined??

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