An interactive guide to the fundamental concepts underlying the origin and evolution of the universe.
The Lambda-Cold Dark Matter (ΛCDM) model is the standard model of Big Bang cosmology, describing the universe’s origin, evolution, and composition. This guide explains its key components, the cosmic epochs from the Planck epoch to structure formation, and the evidence supporting it.
The cosmological principle is the foundational assumption that the universe is homogeneous and isotropic on large scales, meaning it looks the same from every location and in every direction. This principle underpins the standard Big Bang model and allows us to study the entire cosmos from a single vantage point.
The Hubble constant measures the rate of cosmic expansion, a key number in cosmology. Learn how it’s measured, why it matters, and what the Hubble tension reveals about the universe’s evolution.
