PBS Space Time PBS Space Time

Interstellar Expansion WITHOUT Exceeding the Speed of Light

Nov 4, 2026 · 26m

Summary

PBS Space Time explores the feasibility of building a generation ship to settle Proxima Centauri b within the next few decades. The episode analyzes critical engineering challenges, including propulsion options ranging from conventional chemical drives to nuclear fusion, and the massive infrastructure required for life support, food production, and water recycling.

Topics discussed

Sponsors: LinkedIn and Gatorlite Intro: The middle children of history The case for generation ships Mission scenario: Settling Proxima Centauri b Defining mission constraints and parameters Propulsion: Chemical drives and Parker Solar Probe Propulsion: Nuclear fusion concepts and speeds Crew size and genetic diversity requirements Ship design and artificial gravity Food production and protein sources Water recycling and radiation shielding Atmosphere management and biosphere Mental health, VR, and AI therapy Cultural preservation and social structure Conclusion and documentary promotion Outro and sponsor reads
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