On Tuesday, Amazon.com, Inc. (NASDAQ:AMZN) Web Services CEO Matt Garman said the idea of putting data centers in space remains impractical and uneconomical.

The rapid expansion of artificial intelligence is driving unprecedented demand for computing power, electricity and cooling, pushing cloud providers to the limits of traditional, land-based data centers.

Those pressures have sparked interest across the tech industry in unconventional alternatives, including deploying data centers in orbit, where solar energy is abundant and cooling challenges could be reduced.

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However, the AWS CEO made it clear that such ideas remain firmly in the realm of long-term speculation.

Speaking at the Cisco AI Summit in San Francisco, Garman said the physical and economic realities of building infrastructure in space make the concept far from viable today.

Garman acknowledged the theoretical appeal of space-based data centers, citing advantages like continuous solar power and easier cooling.

However, he stressed that the logistics of getting heavy equipment into orbit are a major obstacle.

“If you think about the cost of getting a payload into space today, it’s massive,” Garman said. “It is just not economical.”

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He noted that server racks can weigh around a thousand pounds and pointed out that humanity has yet to build permanent, large-scale structures in space.

“There are not enough rockets to launch a million satellites yet,” he added, calling space data centers “pretty far” from becoming reality.

According to Garman, the core constraint is not computing technology but transportation.

The limited availability and high cost of rocket launches make scaling any kind of orbital data center infeasible for now.

While companies like Blue Origin — founded by Amazon founder Jeff Bezos — are working to reduce challenges faced by traditional data centers, Garman said prices would need to fall dramatically before space-based infrastructure makes economic sense.