The universe is thirteen point eight billion years old, and the furthest thing we can see sits forty-six and a half billion light-years away. Those two numbers should not be able to coexist. What would it actually cost — in fuel, in years, in energy — to cross that gap and stand at the edge of everything?

A slow walk out through expanding space, past galaxies already receding faster than light, toward a boundary that behaves like nothing else in physics. The strangest part is what happens when you try to make the ship faster.

Get cozy and let this long, patient journey out toward the edge of the universe keep you company tonight. Subscribe to The Sleepy Solstice if you like your sense of scale quietly taken apart.

CHAPTERS

00:00 Introduction

01:09 The Number That Should Not Exist

10:24 The Ground That Moved

20:35 The Galaxies Already Outrunning Light

29:48 There Is No There

39:11 Four Walls, and Only One of Them Is Real

49:38 The Line We Are Already on the Wrong Side Of

1:00:06 What Is Still Ours

1:09:03 The Price of the Crossing

1:19:30 Two Clocks

1:28:58 The Drive That Would Not Help

1:38:14 The Universe That Forgets

1:47:32 Why We Will Never Make It

SOURCES

arXiv — Davis & Lineweaver, "Expanding Confusion" (astro-ph/0310808) — https://arxiv.org/abs/astro-ph/0310808

Publications of the Astronomical Society of Australia — "Expanding Confusion" — https://www.cambridge.org/core/journals/publications-of-the-astronomical-society-of-australia/article/expanding-confusion-common-misconceptions-of-cosmological-horizons-and-the-superluminal-expansion-of-the-universe/EFEEEFD8D71E59F86DDA82FDF576EFD3

arXiv — Toby Ord, "The Edges of Our Universe" (2104.01191) — https://arxiv.org/abs/2104.01191

MNRAS — "The evolution of our local cosmic domain: effective causal limits" — https://academic.oup.com/mnras/article/398/3/1527/1267202

arXiv — "The Evolution of Our Local Cosmic Domain: Effective Causal Limits" (1001.4572) — https://arxiv.org/abs/1001.4572

arXiv — "A causal limit to communication within an expanding cosmological civilization" (2208.07871) — https://arxiv.org/abs/2208.07871

arXiv — "Superluminal Recession Velocities" (astro-ph/0011070) — https://arxiv.org/abs/astro-ph/0011070

Caltech NED — Hogg, "Distance measures in cosmology" — https://ned.ipac.caltech.edu/level5/Hogg/Hogg4.html

Astronomy & Astrophysics — "Planck 2018 results. VI. Cosmological parameters" — https://www.aanda.org/articles/aa/pdf/2020/09/aa33910-18.pdf

arXiv — "Planck 2018 results. VI. Cosmological parameters" (1807.06209) — https://arxiv.org/abs/1807.06209

arXiv — "The Return of a Static Universe and the End of Cosmology" (0704.0221) — https://arxiv.org/abs/0704.0221

arXiv — "The Long-Term Future of Extragalactic Astronomy" (astro-ph/0107568) — https://arxiv.org/abs/astro-ph/0107568

arXiv — "Evolution of the Cosmological Horizons in a Concordance Universe" (1302.1609) — https://arxiv.org/abs/1302.1609

arXiv — "The Shared Causal Pasts and Futures of Cosmological Events" (1305.3943) — https://arxiv.org/abs/1305.3943

arXiv — "Intergalactic spaceflight: an uncommon way to relativistic kinematics and dynamics" (physics/0608040) — https://arxiv.org/abs/physics/0608040

arXiv — "The warp drive: hyper-fast travel within general relativity" (gr-qc/0009013) — https://arxiv.org/abs/gr-qc/0009013

arXiv — "Exotic solutions in General Relativity: traversable wormholes and warp-drive spacetimes" (0710.4474) — https://arxiv.org/abs/0710.4474

arXiv — "The limits of cosmology" (1001.4016) — https://arxiv.org/abs/1001.4016

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Disclaimer: This channel makes educational entertainment. All factual statements come from published research and recognized scientific organizations. Segments covering speculation, alternative theories, or the narrator's own interpretation are flagged as such within the video. The Sleepy Solstice does not report the news. Watch at your own discretion.

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