Squarespace Website Builder

Head to https://squarespace.com/physicsexplained to save 10% off your first purchase of a website or domain using code PHYSICSEXPLAINED How do we actually know the Big Bang happened? In this video, we follow the chain of evidence step by step, from measuring the distances to stars and galaxies, to redshift, cosmic expansion, and the discovery of the cosmic microwave background. This is the story of how light, physics, and careful observation revealed that the universe began in a hot, dense state. 🤝 Support the channel Patreon → https://www.patreon.com/physicsexplained 🔗 Follow me Instagram → https://www.instagram.com/physics_explained_ig X (Twitter) → https://twitter.com/PhysicsExplain1 Sources, References and Further Reading: Weinberg, S. The First Three Minutes: A Modern View of the Origin of the Universe. Basic Books. https://www.basicbooks.com/titles/steven-weinberg/the-first-three-minutes/9781668612149/ Singh, S. Big Bang: The Origin of the Universe. Fourth Estate / HarperCollins. https://books.google.com/books/about/Big_Bang.html?id=AWjLAAAACAAJ Krauss, L. M. A Universe from Nothing: Why There Is Something Rather than Nothing. Simon & Schuster / Free Press. https://www.simonandschuster.co.uk/books/A-Universe-From-Nothing/Lawrence-M-Krauss/9781471112690 Gribbin, J. 13.8: The Quest to Find the True Age of the Universe and the Theory of Everything. Yale University Press / Icon Books. https://books.google.com/books/about/13_8.html?id=1v6oCwAAQBAJ Pharaoh, L., Bishop, C., and Gidzewicz, C. AQA A-Level Physics Year 2 Student Book (includes Astrophysics). Collins. https://collins.co.uk/products/9780007597642 Liddle, A. An Introduction to Modern Cosmology. Wiley. https://www.wiley.com/en-us/An%2BIntroduction%2Bto%2BModern%2BCosmology%2C%2B4th%2BEdition-p-9781118502143 Olesen, P. An Introduction to Cosmology. Lecture notes / article. https://cds.cern.ch/record/366328/files/p220.pdf Ryden, B. Introduction to Cosmology. Cambridge University Press. https://www.waterstones.com/book/introduction-to-cosmology/barbara-ryden/9781107154834 Reid, D. D., Kittell, D. W., Arsznov, E. E., and Thompson, G. B. “The Picture of Our Universe: A View from Modern Cosmology.” https://ned.ipac.caltech.edu/level5/Sept02/Reid/paper.pdf Morison, I. Introduction to Astronomy and Cosmology. Wiley. https://books.google.com/books/about/Introduction_to_Astronomy_and_Cosmology.html?id=UVydyI8XKBgC Roos, M. Introduction to Cosmology. Wiley. https://books.google.com/books/about/Introduction_to_Cosmology.html?id=EOI-MNHKWFsC