The Thermodynamics of Intelligence

The limit on AI isn’t silicon. It’s heat.

That is why Elon Musk is merging SpaceX and xAI: to move the world’s biggest supercomputer into orbit.

The headline story is financial ($1.25T valuation). But the physical story is thermodynamics.

Data centres are just massive heaters that happen to do maths.

As rivals build 10-gigawatt supercomputers (like OpenAI’s Project Stargate), the problem on Earth isn’t building them. It’s cooling them down.

We are hitting the limits of what air and water can do. We are hitting the limits of the power grid.

So, where do you go when the ground is too hot?

You go up.

Orbital compute solves the two hardest problems:

1. Energy: Unblocked solar power. No night. No clouds.

2. Cooling: Deep space is -270°C. A bottomless heat sink.

The only catch is gravity. Lifting a supercomputer is expensive.

But that is the point of the merger. One company builds the brain. The other owns the lift.

If you want to build a brain that uses more power than a G7 nation, the logic points to orbit.

This isn’t just merging two companies. It is merging the physics.