Cosmological circle

How is the universe shaped?
As far as cosmologists can tell, space is almost perfectly flat.
But what does this mean? The theory of general relativity, under which space itself can curve, allows for the universe to take one of three forms: flat like a sheet of paper, closed like a sphere, or open like a saddle..
Is the universe a 3 sphere?
A positively curved universe is described by elliptic geometry, and can be thought of as a three-dimensional hypersphere, or some other spherical 3-manifold (such as the Poincaré dodecahedral space), all of which are quotients of the 3-sphere..
Why does the universe like circles?
It has to do with some basic laws of physics.
The sphere is a shape which allows for the most amount of volume with the least amount of surface.
It is a very efficient way of enclosing objects and also allows for any point on its surface to be equally as far from the center as any other point..
The topology of the Universe globally is hyperbolic as proposed and analysed mathematically "The Hyperbolic Geometry of the Universe and the wedding of General Relativity Theory to Quantum Theory”.
There are basically three possible shapes to the Universe; a flat Universe (Euclidean or zero curvature), a spherical or closed Universe (positive curvature) or a hyperbolic or open Universe (negative curvature).

The Cosmological Circle is a geometric diagram that has appeared in the arts, crafts, architecture, religion and literature of cultures around the world, and is ImagesView allView all

The Cosmological Circle is a geometric diagram that has appeared in the arts, crafts, architecture, religion and literature of cultures around the world, and is

Cosmological circle

How is the universe shaped?

Is the universe a 3 sphere?

Why does the universe like circles?