How to build interplanetary blockchains?

- What happens when latency is in the order of minutes, hours between ? 
- How do you build consensus? 
- Do individual planets just have their own chain?

creating and destroying; built flying cars & autonomous vehicles, now building /faust, more here: /july, web: july.rocks

Not a physicist or anything, but in Three-Body Problem, sophons were sent to earth to have "instant communication channel." Perhaps that can be used, and it's triggered whenever a chain updates - kind of like webhooks but intergalactic.

not physicist either but sounds like something quantum would be at play

> Quantum entanglement — or "spooky action at a distance," as Albert Einstein famously called it — is the idea that the fates of tiny particles are linked to each other even if they're separated by long distances