**
Timeline From Big
Bang to Today**

| MAIN PAGE | PRODUCTS |
CONSULTING |
MISSION
| RESUME |

**
BACK TO WARP
DRIVE THEORY**

Timeline from the Big Bang to
today and the analogy with 3-D Minkowski spacetime

3-D light cone and the Minkowski spacetime interval, ds^{2} = (c dt)^{2}
- dx^{2} - dy^{2
}

3-D (x,y,t) **spacetime**
geometries with various curvature

**General
Relativity** states the geometry of **
spacetime** depends on average mass-energy
density. For a Euclidian or flat universe
the average mass-energy density is defined
as r_{c}
which is also known as the critical density.
The curvature (K) of a flat universe is zero
when the ratio of mass-energy density to
critical density (W)
equals
1. Similarly, if the ratio of average mass-energy density to
critical density is greater than 1 then the
Universe is considered closed having
positive curvature like a sphere. Finally,
if the ratio of average mass-energy density
to critical density is less than 1 then the
Universe is considered open having negative
curvature like a saddle.
The present Universe is considered flat
because the overall mass-energy density is
very nearly equal to the critical density (r_{c})
required for flat spacetime. |