Philip Johnston, co-founder of StarCloud, joins Mark and Jeremy to explain how the company plans to build AI data centers in space.

StarCloud is developing orbital computing infrastructure designed to run large numbers of GPUs using solar power. Instead of relying on water-based cooling systems, the company plans to remove heat through large space radiators and transmit data between orbit and Earth using optical links.

The economics of the idea depend heavily on falling launch costs. As reusable rockets reduce the cost of reaching low Earth orbit, companies such as StarCloud are exploring whether energy-intensive computing could eventually be moved away from terrestrial power grids and data centers.

In this episode, we discuss:

• How data centers in space would work

• Why StarCloud wants to place AI GPUs in low Earth orbit

• How space-based computers can be cooled without water

• Whether solar power could reduce the energy costs of AI computing

• How laser communication links compare with terrestrial fiber

• Where orbital networks could offer lower latency

• How falling SpaceX launch costs affect the economics of space infrastructure

• What hardware StarCloud plans to launch

• The engineering and commercial challenges facing orbital data centers

Philip also explains why StarCloud believes space-based computing could support the growing demand for AI infrastructure without placing the same pressure on terrestrial electricity grids and water supplies.

The conversation examines whether orbital computing is a practical extension of cloud infrastructure or an ambitious response to problems that are still cheaper to solve on Earth.

Please enjoy the show and share it with a curious friend.

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Chapters

(00:00) The impact of earth based compute

(03:09) Data centers in space

(08:36) Conquering Latency Challenges in Space

(10:32) Modular Space Infrastructure

(16:03) How much do space based data centers cost?

(19:46) Manufacturing Beyond Earth's Boundaries

(26:00) Reusability and space junk

(26:15) GPUs in Orbit

(28:52) Future Tech Rapid-Fire Questions

(29:55) 5 Billion Humanoids

(32:35) Addressing Space Skepticism

(33:41) Quantum Computing's Orbital Advantage

The Humanoid Difference

(37:20) Where Are All the Aliens? Exploring the Fermi Paradox

(38:35) Behind the Scenes

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