4 ms·

Wouldn’t that be more applicable in a universe that wasn’t flat (unlike ours as best as we can measure).

• varjag 3y ago
  There is also no air inside and nobody's actually blowing. It's an analogy.
  • theferalrobot 3y ago
    It is an analogy that is used to describe spacetime curvature though… its the wrong analogy.
    • varjag 3y ago
      No it's an analogy used to describe inflation with no boundary.
      • oneshtein 3y ago
        Air balloon has clear boundary.
        • consilient 3y ago
          The volume enclosed by the balloon's surface has a boundary, the surface itself does not.