Description
**Description**
Cosmology addresses the largest questions science has ever attempted to answer, and this course makes those answers accessible without requiring a physics or mathematics degree to follow along. You will begin with the observational evidence for the Big Bang — studying Hubble’s discovery of galactic recession, the cosmic microwave background radiation, and the primordial abundances of hydrogen and helium as three independent lines of evidence that converge on the same conclusion about our universe’s origin. The course walks you through the timeline of the early universe in extraordinary detail: the Planck epoch, quark-gluon plasma, matter-antimatter asymmetry, nucleosynthesis in the first three minutes, and the epoch of recombination when the universe became transparent to light for the first time. A full module on cosmic inflation explains why the universe appears geometrically flat, why the CMB temperature is so uniform across regions that should never have been in causal contact, and how inflation resolves these paradoxes — and you will learn what observational signatures would confirm or challenge inflationary models. You will receive a downloadable cosmic timeline poster spanning from 10⁻⁴³ seconds after the Big Bang to the projected heat death of the universe, designed as both a learning tool and a reference document you will return to throughout the course. The course devotes a complete module to large-scale structure — explaining how quantum fluctuations in the early universe seeded the cosmic web of filaments, voids, and galaxy clusters we observe today, and how the CMB power spectrum encodes this information. Dark matter is covered thoroughly, with a module that presents the observational evidence from rotation curves, gravitational lensing, and the Bullet Cluster collision, surveys the leading candidate particles including WIMPs and axions, and explains why detection has proven so elusive. A dedicated module on dark energy examines the discovery of accelerating universal expansion through Type Ia supernova surveys, the cosmological constant problem, and alternative explanations including quintessence and modified gravity theories. You will study the geometry of the universe — flat, open, and closed models — and learn what the current measurements of the Hubble constant, Omega parameters, and CMB data tell us about which geometry we actually inhabit. The course addresses the tension between different measurements of the Hubble constant — one of the most significant unresolved problems in contemporary cosmology — and explains what its resolution might reveal about new physics. The final module presents the five possible futures of the universe: the Big Freeze, Big Rip, Big Crunch, Big Bounce, and vacuum decay, and explains the observational evidence that currently favours each scenario.
**Format**
Structured video course with a downloadable cosmic timeline poster, CMB data visualisation guide, and a curated reading list from accessible science publications.
**Duration**
5.5 hours of video content across 13 modules, with supplementary visual reference materials.
**What You’ll Learn**
Big Bang evidence and timeline; cosmic inflation; large-scale structure; dark matter and dark energy; universe geometry; Hubble tension; ultimate fate scenarios.
**Target Audience**
Curious adults, science communicators, students studying physics or astronomy, and anyone who wants a rigorous but accessible grounding in modern cosmological science.
