On Tuesday, August 25, 2020 at 7:31:02 AM UTC+2, eripe wrote:   
   <>   
   > What is AsFTL?   
      
   Sorry, meant to say AsFAL or As Fast As Light.   
      
   > As long as you can prevent anyone entering a wormhole from violating   
   causality, you should be ok.   
   >    
      
   If transit of objects with mass (like spaceships and people and stray helium   
   ions) only travel through at 99% C (without making the energy investment   
   required to accelerate to that speed without the wormhole) does that count for   
   'ok'? And assuming they    
   retain whatever momentum they had at the moment of entering the wormhole, so   
   without any further use of reaction mass they will move away from the   
   destination end of wormhole at the same speed that they approached the start   
   end, does that count as ok?   
      
   > Faster than light, relativity, causality. Pick any two.   
      
   I've heard this before, from the lips (or fingertips) of people who are   
   definitely much, much smarter than myself, and much better educated.   
      
   But I have also heard the same people speculate that the Universe might not   
   actually care about Causality, except on a local scale.    
      
   > Say someone takes a wormhole and speeds it up to 99% light speed. Now this   
   wormhole is only aging 55 days pr year. Make it a round trip and then park it   
   next to another wormhole and viola: a time machine.   
      
   Is the wormhole moving at 99% or is that it's 'Transport speed'?   
      
      
   >    
   > Likewise, if someone flies through a wormhole at 99%, does he arrive at the   
   destination according to his clock (which can be both in the past or the   
   future, depending on his direction), or the gate clock. I'm not sure on this   
   one.   
      
   If someone goes through at 99% of C he arrives at the destination 1% later   
   than the photons that left at the same time as him. Right? That would imply   
   some kind of Universal Clock, or a Universal frame of Reference, which is one   
   of those things that    
   people who spend too much time thinking about General Relativity speak about.   
      
   So assuming a 10 light year trip.   
   Photons arrive on Day 3652.5.   
   The spaceship is only 99% of the way there at this point, so it will take   
   another 36.52 days to arrive.   
      
   Right?   
      
   The benefit of the trip is any Relativistic effects on the person's aging, and   
   the fact that ship doesn't need to expend the energy / reaction mass to   
   accelerate to near-C.   
      
   >    
   > I believe there should be a way around this.   
   > Say the wormhole system all go via hyperspace, where the speed of light is   
   infinite, then you have no relativity, and there is only 1 clock.   
   > The membrane between normal and hyperspace will slow anything traveling   
   faster than 1000 m/s down to 1000, and the excess energy converted to heat.   
      
   Hyperspace and others like it cover over a multitude of ... of whatever it is   
   that the unsensible SF writer needs covered over.    
      
   I'm wanting a situation where citizens are faced with a very big personal   
   issue when it comes to interstellar travel. It'll be over for you in a couple   
   of years, but on the longer trips, by the time you get home your grandchildren   
   will ready to cash    
   their first Social Security Check.    
      
   Travel to and from the 'jumping off' points is long too, limited by reaction   
   mass and energy densities of interplanetary ships powered either by fission or   
   fusion, or accelerated by pumped (i.e.: huge lasers, giant solar concentrators   
   or gigantic    
   particle accelerators that double up as planetary anti-meteor defense) solar   
   or magnetic sails.   
      
   No magical anti-gravity. You either have spin-induced pseudo-gravity or   
   experience 'G's during the acceleration / deceleration periods of the flight.   
      
   For safeties sake (and perhaps because of the building process) worm holes are   
   always remote from a star system's Goldilocks zone. Perhaps usually tethered   
   to a Neptune-type gas giant (possibly manufactured from its moons). Systems   
   with multiple worm    
   holes would have multiple different, and very distant from each other wormhole   
   entry points.   
      
   With this sort of restraints on a human civilization war between star systems   
   is almost impossible, and unlikely to be profitable, and trade is really only   
   restricted to absolutely the most rare and precious of commodities. People   
   will trade in    
   information, be it scientific, history, entertainment or ... whatever. Sending   
   goods is just too time and energy consuming. Except for the really, really   
   rare, like a work of art, or DNA that can not be replicated on the other side.   
      
      
   Over and above the restrictions I've placed on travel I  want this vast realm   
   of diverse human societies to be hamstrung by an obvious (to the reader) lack   
   of advanced computers, or the understanding of DNA-manipulation. The standard   
   computers available    
   to most civilizations would be similar to what Earth society had in the late   
   70s. Their understanding on DNA is probably limited to what we knew in the 80s   
   or 90s. And yes there is a very good reason why this has remained the same for   
   millenia, and yes    
   there is a shadowy organization in the shadows making sure it stays that way,   
   at least until they decide otherwise.   
      
      
   Anyway,   
      
   Thanks you for your input.   
      
   Take care and regards   
   Frank   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)