The head of Amazon’s cloud business says major obstacles need to be overcome before space-based data centers are a reality.

Elon Musk's mega-merger of his companies xAI and SpaceX this week brings this sci-fi dream a step closer.

The merger will “form the most ambitious, vertically-integrated innovation engine on (and off) Earth, with AI, rockets, space-based internet, direct-to-mobile device communications and the world’s for...