It's been a long time since I read Foundation, but I'm pretty sure Asimov was too smart to explain how those "ultrawave relays" worked. As a reader I am therefo

It's been a long time since I read Foundation, but I'm pretty sure Asimov was too smart to explain how those "ultrawave relays" worked. As a reader I am therefore free to assume that they are based on future physics discoveries (maybe involving wormholes?). That's fine as long as there is no obvious contradiction of known physics. The really hard way though is to do what Robert Forward did in "Flight of the Dragonfly [1]: it includes 30+ pages and 12 figures with technical details. He worked it all out at the level of a real mission proposal. [1] https://en.wikipedia.org/wiki/Rocheworld https://en.wikipedia.org/wiki/Rocheworld