[Spktyr]

One thought is that a lunar railgun could take the place of an even more expensive and very vulnerable terrestrial nuclear arsenal. Lunar rocks cost nothing and there is nothing in the US arsenal that will stop an incoming cee-fractional lunar projectile.

[GonzoGOP]

One thought is that a lunar railgun could take the place of an even more expensive and very vulnerable terrestrial nuclear arsenal. Lunar rocks cost nothing and there is nothing in the US arsenal that will stop an incoming cee-fractional lunar projectile

And no radiation. You can't nuke an enemy stronghold and then occupy it the next day. Drop a rock on in and you can move in as soon as the rock cools down enough to stop being a liquid. And if they bury their command center under a mountain. Just use two or three consecutive shots to remove the mountain.

It completely changes the meaning of the phrase, "What are we supposed to do throw rocks at them?"

Now a lunar rock isn't a c-fractional relativistic projectile. But they are cheap, accurate, and can make a big hole in the ground. The cheap factor is important because an Earth launched interceptor costs so much that you can't possibly build enough that you can shoot down all the rocks.