The Edge of the Universe Is Far Stranger Than You Think

Does the universe have an edge? A calm space documentary about the edge of the observable universe, the oldest light in the cosmos and what lies beyond the horizon. Is the universe infinite or curved? The cosmic microwave background, the shape of space, the great cosmic voids, dark energy and the galaxies we will never reach, explained step by step. More than two thousand years ago, Archytas asked what would happen if you stood at the edge of everything and threw a spear. Tonight we follow that question outward — the dark night sky, the cosmic horizon some 46 billion light-years away, the oldest light ever seen, the flatness of space, the great empty voids and the accelerating expansion — until we can finally answer him. 🔭 See the sky with your own eyes — what we'd recommend: • Unistellar Odyssey smart telescope: https://www.amazon.com/dp/B0CQMD3R3Z/... • Red astronomy flashlight: https://www.amazon.com/dp/B0F8W2559S/... • Universe (DK visual encyclopedia): https://www.amazon.com/dp/1465499954/... As an Amazon Associate I earn from qualifying purchases (at no extra cost to you). Chapters 0:00 Intro — The Edge of Everything 2:14 Part 1 · The Spear and the Dark Night 12:39 Part 2 · The Horizon 21:09 Part 3 · The Oldest Light 32:46 Part 4 · Infinite, or Curved? 44:08 Part 5 · Beyond the Horizon 48:41 Part 6 · The Great Emptiness 56:35 Part 7 · The Galaxies We Will Never Reach 1:07:11 Part 8 · What We Do Not Know 1:15:17 Part 9 · The Light in Your Eye Sources: NASA, ESA, the Planck Collaboration (2018), WMAP, COBE (1992), Penzias & Wilson (1965), Dicke et al. (1965), the Supernova Cosmology Project and the High-z Supernova Search Team (1998), Tully et al. (2014, Laniakea), DESI. Image & video credits NASA; NASA/JPL-Caltech; NASA Goddard Space Flight Center. ESA and the Planck Collaboration — used under CC BY 4.0 (https://creativecommons.org/licenses/.... Thumbnail: AI illustration. Images have been cropped, panned and zoomed. Some images are artist's illustrations or simulations. Use of NASA imagery does not imply NASA endorsement. Narration voice generated with AI; script researched, fact-checked and written by Alpha Centauri Signals. Music: original, made for this channel. If you enjoy this kind of content, subscribe and let us know what you'd like to see in the next video. 🌌 #SpaceDocumentary #EdgeOfTheUniverse #ObservableUniverse #Universe #AlphaCentauriSignals