On Saturday, May 6, 2017 at 6:38:20 PM UTC-5, Mr Anderson wrote:   
   > as interstellar RKVs, and they are precise enough to hit the enemy planet in   
   enemy's system,    
      
   This is an incredible handwave.    
   .95c is a gamma factor of ~3.2.    
   At .95c and 1 g of maneuverability, you would travel 5 meters laterally and   
   285,000,000 meters along your previous course in 1 second of maneuvers. That   
   is a deviation of 17.5 nanoradians per second from your previous course in   
   your frame of reference.    
   But there is a gamma fact of 3, so 1 second for the RKKV is 3 seconds to an   
   outside observer. This thing can't functionally maneuver, dodge, or course   
   correct.    
      
   > Also, what could be a countermeasure to dense objects travelling at 0.95 c?   
   Because if there is such thing, it's not MAD anymore. An, at last, how could   
   the attacked system detect incoming missiles, when there are many possible   
   angles of attack? Could    
   there be a plausible justification for spies that observe the situation and   
   send signal to mothersystem if they see launch, so they can launch their   
   missiles?   
      
   Since it can't drunkwalk, maneuver, or dodge because it is traveling too fast,   
   just have a computer plot a firing solution based off of the Lorentz   
   transformations. The bigger it is, the longer the range that it can be   
   detected at.    
      
   The best defense is early warning systems. The earlier it is detected, the   
   farther away from anything valuable that it can be destroyed. For example, if   
   your detection range with a 10 meter diameter sensor is 10e9 km, then you will   
   have 27.7 seconds to    
   destroy it. But since we are talking RKKVs here, then your civilization should   
   be able to build sensors that are multiple kilometers in size. So for the same   
   RKKV, if your sensor has an aperture 100 km in diameter, then you have 3.47   
   hours of notice. And    
   the kicker is that the 100 km detector can be a sparsely populated array   
   composed of say 10,000 of the 10 meter telescopes linked together.     
      
   RKKVs are only a threat to low tech civilizations, which lack the industrial   
   might of their betters. Nicoll-Dyson Lasers on the other hand are terrifying   
   interstellar weapons, but at that point it is time to break out the Berseker   
   fleets.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)