4 ms·
Asteroid mounted railguns (unmanned,) and on the moon, and on picket platforms. Massive kinetic projectiles moving at a significant fraction of c should be eff
by robbedpeter 5y ago
Asteroid mounted railguns (unmanned,) and on the moon, and on picket platforms. Massive kinetic projectiles moving at a significant fraction of c should be effective unless ftl or force fields are possible. 1000 years of collective effort to prepare could riff off of technology we've got at hand. Nuclear power and building material could be lifted from earth, but it'd be far more effective to mine asteroids.
Of course, if we mine asteroids, things on earth would be possible that are too expensive now, and we could see exponential technological progress.
- DougN7 5y agoThat’s all true, but unless you assume technology peaks, the aliens would have passed those points and counter acted all of that a 1000 years earlier. Maybe they have million mile wide EMPs that destroy all our electronics. It’s very hard to catch up when the other side is advancing at a similar rate. The situation already shows they are very bright and motivated.