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I Can a Torus be Gravitationally Bound?

  1. Apr 10, 2016 #1
    Now I asked a question the other day about the gravitational binding energy of a torus, and someone responded that it cannot be gravitationally bound purely, but requires some opposing force.
    Okay, fine. But, qualitatively, can a toroidal planet be gravitationally bound if it has another force holding its structure together from clumping into a ball? What do you think?
     
  2. jcsd
  3. Apr 11, 2016 #2

    mfb

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    Staff: Mentor

    Would you call it "gravitationally bound" then? You can shoot a doughnut to space, then you have a stable torus shape in space.
    For planet-sized objects, apart from artifical construction there is nothing that could support such a structure.
     
  4. Apr 11, 2016 #3
    Right, so with artificial construction holding it together, could it still be considered gravitationally bound?
     
  5. Apr 11, 2016 #4

    berkeman

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    Staff: Mentor

    Those two statements do not seem consistent... :wink:
     
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