Why would anyone put a data center in space?

Hook

Why and how would anyone put a data center in space? On October first, Google sent a refrigerator-sized satellite into orbit carrying four of its AI chips. It's the first test of Project Suncatcher. Here's the idea behind it.

Power

AI runs on electricity, and lots of it. Google expects to spend one hundred eighty to one hundred ninety billion dollars on infrastructure in 2026 alone. Data centers are competing for power plants, power lines and water, and power is becoming the bottleneck.

Sun

In the right orbit, the sun almost never sets. Google says solar panels in that kind of orbit can generate up to eight times as much power as on the ground, without needing heavy batteries for the night.

Test

The prototype was built with the satellite company Planet and launched on SpaceX's Transporter eighteen rideshare. Its four chips run a small version of Google's Gemma AI model, for fifteen minutes at a time, to see if they survive radiation, launch shaking and extreme temperatures.

Heat

Why only fifteen minutes? Heat. On Earth, fans and water carry heat away. In space there's no air, so heat pipes move it to radiators that glow it off as infrared. Radiators are heavy, and every pound costs money to launch.

Cluster

The bigger plan is clusters of satellites flying close together, each with dozens of chips, talking to each other with lasers. Google plans to launch two more satellites in 2027 to test those laser links.

Catch

There are big hurdles. You can't send a technician to swap a broken part, launches are expensive, and rockets and re-entering satellites add pollution. The project's lead doesn't expect space data centers to be cheaper within five years. Others are racing too, including Starcloud and SpaceX.

Close

So the idea is to follow the power: put AI chips where the sun almost never sets, if the heat and the cost can be beaten. ThatsWhyHow.