Elon Musk is bringing the same revolutionary thinking that helped him upend the car industry to the data center business with promises this week to put up to a million new satellites in the sky. But it won’t be easy. Experts say it’s not clear how Musk will keep these orbiting AI supercomputers from overheating, fix glitches on gear in the sky, and stop space debris from punching a hole in his ambitious plans. To help him reach his goals, Musk combined SpaceX with his AI business on Monday and is planning massive IPO later in the year.