Astronomy Cast Ep. 778: Dyson Swarms
Published: January 12, 2026
Duration: 36:49
https://www.youtube.com/watch?v=cySk8O0iVjU
Hosted by: Fraser Cain (@frasercain ) and Dr. Pamela L. Gay (@CosmoQuest )
Streamed live on Jan 5, 2026.
Freeman Dyson asked a fascinating question. What would it look like if a civilization was using all the energy coming from their star? And what form would this take? This introduced the concept of a Dyson Sphere, or more realistically, a Dyson Swarm surrounding a star. But if you're skeptical about the concept, you're in good company.
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