[HN Gopher] The horizon problem for faster than light travel
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       The horizon problem for faster than light travel
        
       Author : hhs
       Score  : 19 points
       Date   : 2022-01-18 20:35 UTC (2 days ago)
        
 (HTM) web link (eriklentzphd.blogspot.com)
 (TXT) w3m dump (eriklentzphd.blogspot.com)
        
       | awb wrote:
       | > But what is the horizon problem? Is it some single well-defined
       | concept or a catch-all term for many phenomena?
       | 
       | Granted this article is largely above my reading/comprehensive
       | level, but after describing multiple types of horizons and then
       | saying a wrap drive horizon largely resembles a black hole
       | horizon, I can't see where the author actually defines "the
       | horizon problem".
        
         | hhs wrote:
         | > "the horizon problem"
         | 
         | It looks like the author was referring to this: "Horizons pose
         | an issue for warp drives as one cannot control the warp bubble
         | if one see or communicate with it."
         | 
         | And for more context, the author seems to note that faster than
         | light traveling is possible under Einstein's physics:
         | https://www.sciencealert.com/faster-than-light-travel-is-pos...
        
       | stevebmark wrote:
       | Faster than light travel and time travel are both fundamentally
       | impossible in our universe and can't be achieved. I'm sure we'll
       | learn all sorts of cool things looking for ways in. The reality
       | is these will sadly live only in science fiction. There are
       | plenty of things that are fundamentally impossible in our
       | universe, faster than light travel being one of them.
        
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       (page generated 2022-01-20 23:00 UTC)