The interactive reference to the origin and evolution of the universe, covering core concepts and common inquiries.
Grand Unified Theories (GUTs) propose that the strong, weak, and electromagnetic forces were once a single unified interaction in the earliest moments of the universe. This article explores the physics of GUTs, the Grand Unification Epoch, and the full cosmic timeline from the Planck epoch to structure formation.
Quantum gravity is the theoretical bridge between general relativity and quantum mechanics, essential for understanding the Planck epoch — the earliest phase of the universe. This interactive guide explores the full cosmic timeline from the initial singularity to the present day, covering inflation, nucleosynthesis, recombination, and structure formation.
Cosmic inflation, the exponential expansion of the universe in its first fraction of a second, is predicted to have generated a background of primordial gravitational waves. Detecting these ripples in spacetime would provide direct evidence for inflation and reveal physics at energies far beyond particle accelerators, connecting quantum mechanics with gravity.
A comprehensive guide to the horizon problem, why the cosmic microwave background is so uniform, and how cosmic inflation resolves this paradox, with a timeline of cosmic epochs.
The horizon problem asks why distant regions of the universe have nearly identical temperatures despite never being in causal contact. Cosmic inflation solves it by stretching a tiny, causally connected patch to cosmic scales, explaining the uniformity of the cosmic microwave background and the origin of structure.
The cosmic microwave background (CMB) is the oldest light in the universe, a relic of the Big Bang. Its near-perfect blackbody spectrum and tiny temperature fluctuations provide powerful evidence for cosmic inflation, the theory that the universe expanded exponentially in the first fraction of a second. This article explains how CMB observations confirm inflation and traces the cosmic epochs from the Planck era to structure formation.
The Big Bang did not occur at a single point in space; it happened everywhere at once. This article explores the origin and evolution of the universe, from the Planck epoch to the formation of stars and galaxies, and explains the evidence that supports the standard cosmological model.
The Big Bang was not an explosion in space but an expansion of space itself. This comprehensive guide explains the origin and evolution of the universe, from the Planck epoch to the formation of stars and galaxies, and clarifies why the common ‘explosion’ metaphor is misleading.
Big Bang Nucleosynthesis (BBN) is the process that forged the lightest atomic nuclei—deuterium, helium-3, helium-4, and lithium-7—during the first three minutes of cosmic history. This article explains the physics, the timeline, the observational evidence, and why BBN remains a cornerstone of the standard Big Bang model.
Explore the sequence of cosmic epochs that followed the Planck era—from the Grand Unification and inflation to recombination, the dark ages, and the formation of galaxies. This interactive guide explains the key physical processes, temperatures, and observations that define each stage of the universe’s evolution.
