🚀 go-pugleaf

In article <1992Sep30.000423.15940@spss.com> markrose@spss.com (Mark Rosenfelder) writes:
>In article <1992Sep29.171040.26549@hellgate.utah.edu> tolman%mindblow.cs.utah.edu@cs.utah.edu (Kenneth Tolman) writes:
>>  A frame of reference moving very very fast has a time dilation, correct?
>>(That is, if we are still and looking at someone moving they are "slow")
>>When we look out into the universe- all galaxies are moving away from us,
>>and the very far away galaxies are moving near the speed of light.
>
>So far so good.  When you look into the night sky, you're looking into 
>the past-- a few years ago for the nearby stars, a few billion years ago
>for distant galaxies.
>
>>Therefore, THEIR TIME HAS BARELY BEGUN.  Their civilization's have not 
>>started, and they live in a "young" universe.  
>
>Whoops, no.  It's true that we see Andromeda as it was two million years 
>ago.  But it's not that Andromeda is stuck in the past.  It continues to
>exist, in the present; it's just that our news from there is two million 
>years out of date.
>
>>Thus, if we could travel
>>faster than light, we could jump backwards and live this whole universe
>>through once again.  
>
>No; even if you could travel instantaneously, you could only arrive in
>the Andromeda of today (whose light won't reach us back on Earth for two
>million years), not the Andromeda we see (that of two million years ago).

Noticable time dialation occurs only between two frames of reference 
are moving at reletivistic speeds to each other.  If we were travelling
toward Andromeda near the speed of light, any motion detected within the
Andromeda frame of reference will appear to us to slow down, as per 
special reletivity.  Likewise if an Andromedan were to watch us approach,
all motion occuring with in our frame of reference will appear to slow
down.  However, once we reach Andromeda and begin moving at non-
reletivistic speed, that is, to join thier frame of reference, things
will return to "normalcy".