De Sitter space

De Sitter space is a fundamental solution to the equations of general relativity that describes a vacuum solution with a positive cosmological constant. It represents a model of the universe that is expanding at an accelerating rate, which is consistent with observations of our universe's current accelerated expansion. ### Key Features of De Sitter Space: 1. **Geometry**: De Sitter space can be understood as a hyperbolic space embedded in a higher dimensional Minkowski space.