Google Wants to Send Data Centers to Space—and Just Launched an Experimental Satellite to Test Whether Its Ambitious Plan Will Work

On October 1, Google launched a refrigerator-sized test satellite into low-Earth orbit, marking a significant step towards its ambitious plan of placing data centers in space. The tech giant's goal is to power its AI models with sunlight, utilizing the abundant solar energy available in space. The test, part of Google's Project Suncatcher, aims to evaluate the performance of its hardware in the challenging conditions of space.

According to Travis Beals, Google's senior director of paradigms of intelligence and head of Project Suncatcher, this initial launch is primarily about identifying technical issues and refining future missions. The experimental satellite, developed in collaboration with Planet, carries four custom chips known as tensor processing units (TPUs).

These chips possess the computing power equivalent to a single server in a conventional data center. The TPUs will be operational for 15-minute intervals, during which they can execute Google's Gemini AI and process brief queries, before shutting down to cool down. Google's long-term vision involves launching fleets of satellites, each equipped with dozens of TPUs, enabling them to communicate with each other and with Earth via lasers.

These satellite clusters would function as space-based data centers. Google's decision to explore data centers in space is not unique; other tech leaders like Elon Musk and Jeff Bezos have also proposed this concept as AI's computational demands surge due to opposition and escalating energy consumption. In 2024, data centers consumed around 1.5% of the world's electricity, and this figure could double by 2030, according to International Energy Agency estimates.

Operating in space offers a near-constant source of sunlight, which can provide up to eight times more solar power than on Earth, according to Google's statement. However, deploying a data center in space presents numerous challenges. Advanced computing generates heat, which must be managed using pipes and radiators, as traditional cooling methods like water and fans are ineffective in space.

Moreover, the satellites must withstand space debris and radiation-induced electrical errors. Google remains optimistic, planning to launch two more satellites next year and ultimately, clusters of over 80 satellites if their current efforts prove successful.