Uploaded January 2026 | Updated September 2026, 2 weeks ago
How big could space habitats really get? From O’Neill cylinders to Ringworlds and Topopolises, we explore the true limits of megastructure scale.
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Credits:
How Big Could a Space Habitat Get?
Written, Produced & Narrated by:
Isaac Arthur
Editor: Tim Liusko
Graphics from Fishy Tree, Jarred Eagley, Jeremy Jozwik, J. Dixon, Ken York, Udo Schroeter
Music Courtesy of Chris Zabriskie & Stellardrone
Select imagery/video supplied by Getty Images
Music by Epidemic Sound: nebula.tv/epidemic & Stellardrone
Chapters
0:00 Intro
2:03 Basics of Habitat Scaling
9:30 Cylinder & Ring Habitats — Linear and Radial Extremes
11:00 Banks Orbitals
12:42 Ringworlds
16:24 Chrono-Engineering
17:24 The Topopolis
21:03 Planet-Wrapping Habitats
22:55 Matrioshka Shellworlds
26:17Alternative & Exotic Designs
How big could space habitats really get? From O’Neill cylinders to Ringworlds and Topopolises, we explore the true limits of megastructure scale.
Get Nebula using my link for 50% off an annual subscription: go.nebula.tv/isaacarthur
Watch my exclusive video Chronoengineering: nebula.tv/videos/isaacarthur-chronoengineering-manipulating-time-as-technology
🚀 Join this channel to get access to perks: youtube.com/channel/UCZFipeZtQM5CKUjx6grh54g/join
🛒 SFIA Merchandise: isaac-arthur-shop.fourthwall.com
🌐 Visit our Website: isaacarthur.net
❤️ Support us on Patreon: patreon.com/IsaacArthur
⭐ Support us on Subscribestar: subscribestar.com/isaac-arthur
👥 Facebook Group: facebook.com/groups/1583992725237264
📣 Reddit Community: reddit.com/r/IsaacArthur
🐦 Follow on Twitter / X: twitter.com/Isaac_A_Arthur
💬 SFIA Discord Server: discord.gg/53GAShE
Credits:
How Big Could a Space Habitat Get?
Written, Produced & Narrated by:
Isaac Arthur
Editor: Tim Liusko
Graphics from Fishy Tree, Jarred Eagley, Jeremy Jozwik, J. Dixon, Ken York, Udo Schroeter
Music Courtesy of Chris Zabriskie & Stellardrone
Select imagery/video supplied by Getty Images
Music by Epidemic Sound: nebula.tv/epidemic & Stellardrone
Chapters
0:00 Intro
2:03 Basics of Habitat Scaling
9:30 Cylinder & Ring Habitats — Linear and Radial Extremes
11:00 Banks Orbitals
12:42 Ringworlds
16:24 Chrono-Engineering
17:24 The Topopolis
21:03 Planet-Wrapping Habitats
22:55 Matrioshka Shellworlds
26:17Alternative & Exotic Designs
