Asuras said
An homage to life before civilization. How ironic. xDIf you're attaching rockets to an asteroid and then sending it off to the enemy, I feel as though they could easily and well in advance blow the asteroid up before it became a problem. It seems much more feasible to project a much smaller projectile at much faster speeds (aka space guns) than to fly big rocks at the enemy.Not to mention the fact that using the asteroids as such seems like a big waste of good minerals.
I'd be putting rockets on the sides for lateral maneuvering of the asteroid, but yeah, you could still shoot it down. The question becomes could you shoot down a hundred, or a thousand, or a million? Still yes, but it would require a lot of energy -- more than it would take to launch the rocks in the first place. Intercepting is harder than throwing -- that's why batters get three strikes. Energy-wise, you can build up a lot of power in deep space that defenders can't really match.
For instance, let's say I have a fleet and you have a fleet. I'm deciding to attack earth, and you move your fleet around Sol to stop me.
First thing I do is launch a bunch of rocks at earth. You can shoot them down from Earth -- but it takes tremendous (man-on-the-moon-ish) power to do so.
The thing to do would be to intercept my attack with your fleet -- lasers and defense missiles and railguns and whatever else you wanna use, human shields, whatever. So you do that, and maybe you stop *all* my rocks. Good job!
Now I bring in my fleet; you've already burned all that energy stopping my rocks, and I've got Deep Space kinetics at my back, plus totally un-spent weaponry and power and whatever. I mop you up in a heartbeat, and then move into bombardment mode and glass Planet Earth.
The attacker (almost) always wins, which then begs the question: if I can destroy an equal force at will, why would I ever let someone build up enough of a standing fleet to present a challenge? It's the same result that happened with the F-15 -- its combat record is a whopping 102 kills and
zero losses. Fifty years later (an impossibly long time, for a war machine), nobody can fight it, and the politics follow the power. Space empire seems like the only logical conclusion to me.