History of the Universe and Earth

[BAndrew]

@Scraper.

Not exactly. But you could say so.

The geometry of space in our universe depends on a constant Ω.

• If the curvature is zero, then Ω = 1, and the Pythagorean theorem is correct;
  
• If Ω > 1, there is positive curvature;
  
• Ιf Ω < 1 there is negative curvature.
  

Possible Local Geometries:

• 3-dimensional Flat Euclidean geometry, generally notated as E^3
  
• 3-dimensional spherical geometry with a small curvature, often notated as S^3
  
• 3-dimensional hyperbolic geometry with a small curvature
  

Possible Global Geometries:

• Is infinite in extent or is a compact space;
  
• Has a simply or non-simply connected topology.
  

A spherical universe is possible.



It is clearer in this image:


We don't really know for sure yet.

(Bridge referred to the positive curvature)
Sources: http://en.wikipedia.org/wiki/Shape_of_the_Universe