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Astronomy Cast Ep. 808: Mission Tech Series: Nuclear Rockets Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest) Streamed live on Oct 27, 2026. Once again, chemical rockets are ubiquitous but not as powerful as other propulsion ideas. And one big idea that's been around for decades is using the power of nuclear fission to generate much more thrust for a rocket. Today let's talk about nuclear rockets!