XPost: sci.skeptic, alt.atheism, alt.alien.research   
   XPost: alt.alien.visitors   
   From: Dawn.Belle.Flood@gmail.com   
      
   On 9/22/2025 5:16 PM, Vincent Maycock wrote:   
   > On Mon, 22 Sep 2025 13:51:35 -0500, Dawn Flood   
   >  wrote:   
   >   
   >> On 9/21/2025 10:41 PM, Vincent Maycock wrote:   
   >>> On Sun, 21 Sep 2025 19:25:55 -0500, Dawn Flood   
   >    
   >>>> I would have to take issue even with unmanned space probes, all of which   
   >>>> require some energy to function, even if they are sitting in standby   
   >>>> mode.  Even the PCBs in the spacecraft will degrade over time, as it   
   >>>> would take tens of thousands of years for one to travel the distance to   
   >>>> the nearest star (other than our Sun), Proxima Centauri.  When (and if)   
   >>>> such a probe arrived, it would be completely dead.   
   >>>>   
   >>>> Dawn   
   >>>   
   >>> Have you taken time dilation into account?   
   >>   
   >> I think that's irrelevant, because, getting a spacecraft up to 90% (or   
   >> more) of the speed of light would require enormous amounts of energy,   
   >> and an equal amount of energy to slow the thing down.  What would be the   
   >> source of this energy, especially, that which is needed for the slow-down?   
   >>   
   >> Dawn   
   >   
   > Right.   I was just saying that *if* rockets could reach relativistic   
   > speeds, *then* long life spans for the astronauts would not be a   
   > problem.   
      
   Agreed.  Of course, their rocket would, at those speeds, need to avoid   
   colliding with anything!   
      
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