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Re: When Galaxies Collide

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  • William
    Message 1 of 2 , Feb 4, 2011
      --- In existlist@yahoogroups.com, "rwr" <dick.richardson@...> wrote:
      > When Galaxies Collide
      > In such an event, and which are common it seems, the only thing that
      > matters would be to that of any life forms in the vicinity of such a
      > collision. If there were no life forms thereabouts then it would not
      > matter a damn what happened. It is estimated that a collision, or
      > union, between this, our galaxy, and that of the Andromeda galaxy will
      > occur during the lifetime of our sun. That of course does not mean
      > during the time when life can exist on earth. But what of life in
      > either galaxy at the event of such a merging?
      > It would of course be a slow event lasting millions of years, but even
      > that is short term in cosmological terms of time. It is not a case of
      > individual stars colliding, for that is an almost zero possibility,
      > although it could indeed happen to some of them maybe. However, what
      > effect would the sum of the forces involved have on existing forms of
      > life within those galaxies? I wonder if any life forms have ever
      > existed to experience such an event local to them. It is hardly likely
      > that any civilisation, no matter how far advanced they were, could
      > possibly have any control over such an event, other than to perhaps get
      > the hell out of that region if they had that potential. Kind of
      > world-hopping at a faster rate than the cataclysmic forces were racing
      > towards them within their own galaxy. Another possible alternative
      > might be to get the hell out of that galaxy altogether; and assuming
      > that such a thing were even possible.
      > Then, on the other hand, such an event might not make the least bit of
      > difference to their existence, and thus requiring no action to be taken
      > at all. But you could only know that for sure after the event. If they
      > survived it. It would certainly be fascinating, and a great challenge,
      > to be there at the time; and to witness it. Not that you and I will be.
      > But somebody might be. I can see no reason as to why not. And there is
      > far more to the bigger picture than our cosy little lives here live
      > through. But nevertheless even if all life was blown away from both
      > galaxies life would go on.
      > rwr
      >Dick,I have often pondered a galactic collision. So where would your point of observation be? That question always gets me into concepts of time and distance. If you were alone in intergalactic space how could you communicate what you have observed.The whole problem has impossibilities of scale that seem life span impairments . Since we are in a galaxy we see a panoply of stars. Were we in intergalactic space we would need be on a ship not a planet as it seems planets do not exist in intergalactic space. This ship would need to be far enough away from the colliding galaxys to observe their diameters, that observation point would be thousands of light years away from the event. Nothing would seem to appear during a human lifetime. The situation is voided by time and distance and therefore is a fantasy idea but it is fun to think about. I have seen the moc up computer similations of galactic collision and they are portrayed as swirling disks of stars but as d Dick says there should be no collisions of stars, we can see the computer model but I do not think any human will see the actual event, it is not for us and if not for us, for whom. Bill>
      > [Non-text portions of this message have been removed]
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