Google's first space data center is the size of a refrigerator, holds four chips, and can only run for 15 minutes at a time before it has to shut down and cool off. It launches October 1 on a Falcon 9 out of Vandenberg. The satellite, built with Planet, carries four of Google's Trillium TPUs on about a kilowatt of solar power. Roughly the compute of one server. A normal Google data center runs thousands of these chips. The 15-minute limit is the physics everyone gets backwards. Space is minus…