Could a Fleet of Space Cities Survive Without Earth?

Imagine several established cities spread through the Solar System when regular Earth deliveries stop. Could their homes, farms, mines, factories and transport hubs become one self-sustaining civilisation? This documentary follows a replacement oxygen shipment from lunar soil through processing and transfer, then traces the harder dependencies behind food, medicine, repair, routes and human knowledge. Recycling can reduce what a city needs from outside. It cannot replace every loss, rebuild every machine, or ensure that help arrives when it is needed. The real question is not whether one habitat can seal itself off. It is whether a network can share work without becoming trapped by its own dependencies—and eventually learn to make, move, test and teach the things that keep it alive. Chapters: 00:00:00 Opening Overview 00:03:07 Routine Loops Are Not Independence 00:10:51 The Coupled Life Support Loop 00:18:50 Oxygen Bearing Lunar Soil 00:25:44 One Resource Node, Many Demands 00:32:54 Repair Is a City Function 00:41:10 A Route Is Part of the Cargo 00:49:18 Start With The Parts Can Replace 00:58:05 More Than One Way to Grow Food 01:07:01 Medicine Changes in Flight 01:16:16 Prove Output Before Dependence 01:25:06 Stabilise Before Shipping 01:34:41 Independence Grows in Stages Key sources: MELiSSA Closed Loop Concept - https://www.esa.int/Enabling_Support/... Supplementing Closed Ecological Life Support Systems with In-Situ Resources on the Moon - https://pmc.ncbi.nlm.nih.gov/articles... Biologically-Based and Physiochemical Life Support and In Situ Resource Utilization for Exploration of the Solar System - https://pmc.ncbi.nlm.nih.gov/articles... Basics of Space Flight: Interplanetary Trajectories - https://science.nasa.gov/learn/basics...