Curvature Archives - BigBangRegistry.com

Is the Universe Flat? A Cosmic Epoch-by-Epoch Guide

August 30, 2026 | Curvature | Earnest S. Carroll

Explore the shape and evolution of the cosmos from the Planck epoch to today. Learn how the cosmic microwave background, inflation, and large-scale structure reveal a universe that is flat to within 0.4 percent—yet whose global topology remains unknown.

What Does Omega Mean in Cosmology? The Density Parameter That Shapes the Universe

August 26, 2026 | Cosmology Concepts, Critical density, Curvature | Earnest S. Carroll

Omega (Ω) is the ratio of the universe’s actual density to the critical density, determining whether space is flat, open, or closed. This guide explains its meaning, how it governs cosmic evolution, and its role in the standard Lambda-CDM model.