2 ms·
Good question and I thought about it too after submitting the reply. I guess this is a real obstacle.
by markus_zhang 2y ago
Good question and I thought about it too after submitting the reply. I guess this is a real obstacle.
- qsi 2y agoIt need not be active to send a message. If you build a giant diamond cube or some other gigastructure, it could last for billions (?) of years even after the builders have become extinct. You need it to be detectable at interstellar distances, but the message is simply "we were here once." Maybe you could encode your civilization's knowledge on the gigastructure itself for visitors.