How does Cowboy Space plan to cool GPUs in its orbital data centers?

Baiju Bhatt explained that in space heat leaves mainly by radiation, since there is no air for convection. On Cowboy Space's Big Iron satellite the rocket fairing unfolds into large radiator wings. The ammonia left in the electric-propulsion tank, used as propellant to reach the final orbit, is then pumped through the GPUs as a coolant loop that carries heat out to those wings.

• Bhatt noted that every spacecraft already has a thermal budget, so heat rejection is a familiar problem in the industry.
• The cold gas thruster tanks that orient the upper stage are later used to push the solar booms out.

Source: our own transcription of the episode. The full conversation is on The Shawn Ryan Show (2026-10-27). Read the whole episode summary →

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