StarTalk Radio The New Space Race with Jeff Thornburg
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Sep 30, 2025 In this discussion, aerospace engineer Jeff Thornburg, CEO of Portal Space Systems and a veteran of Air Force, NASA, and SpaceX, shares his insights on the future of space. He highlights the importance of developing highly maneuverable spacecraft and advanced propulsion systems. Jeff discusses the evolution from government-built rockets to commercial alternatives, the lessons learned from failures, and the critical role of R&D funding. He also touches on the potential for AI and quantum propulsion to revolutionize space travel, envisioning a future where lunar travel is as commonplace as a bus ride.
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Speed-As-A-Service In Space
- Portal Space Systems builds very fast, highly maneuverable spacecraft to serve defense and commercial needs in orbit.
- Rapid on-orbit movement fills a strategic and commercial gap traditional satellites cannot address.
From AFRL Engine To Raptor Roots
- Jeff described developing a full-flow staged combustion engine at the Air Force Research Lab early in his career.
- That work seeded later engines and influenced Raptor and other industry propulsion programs.
Why Soyuz Stayed Reliable
- Jeff contrasted Russian and American rocketry origins, noting Russians emphasized reliability and manufacturability.
- That legacy explains why Soyuz remained simple and reliable across decades.