Gavin Baker on orbital data centers and SpaceX engineers changing skeptics' minds: "People are picturing the Death Star or the Pentagon floating around in space. That's not what it is at all." "There's a friend who's another investor who actually is a physics PhD. I had many arguments with him, and he's like, 'I am a PhD, and this is impossible.'" "Then he goes to SpaceX Day, talks to the SpaceX engineers, and he's like, 'Well, I was wrong.'" "You have 10,000 of the world's smartest…