GJO> What amuses me Adam, is that you introduce some extremely abstract idea
:)
GJO>without any scientific basis claiming which you claim is possible while
GJO>claiming impossible travel beyond our solar system with current spacetime
GJO>theories.  Firstly, if humans ever did go to the stars, under current
GJO>physical limitations it would be a one way journey.  U.F.O.s would more
GJO>likely represent short distance crafts used at the destination.  Now for 

GJO>primary craft, where are not impossibilities.  'Huge accelerations' do 
ot
GJO>pose any problem...you can accelerate at 1g (and simulate earths gravity 

GJO>your craft solving lots of potential physical complications) and 
ccelerat
GJO>up to the speed of light in around 1 year.  Time dilation can be a 
enefit
GJO>and produces no problems on the one way trip...it can even be used to 
edu
GJO>the trip time. and finally collision between particles is not an 
mpossibl
GJO>feat to overcome.  The density between the stars is about 1 atom per 
ubic
GJO>metre or so, hardly an impossibility for construction design.
First of all, when Columbus traveled to the West Indies he wasn't
thinking of a one way trip. Comunication is the bases of human comunity
and if it's eliminated, the comunity stops to exist. A one way trip
would couse just that. And you can't accelerate to c - molecules
breaking up and stuff can cause a problem :) I don't think your
exlonation has any scientific explonation basis either. At a constant
acceleration of 1g it would require tremondous ammounts of energy at
speed over 0.5c. And travelling at 0.99c, the space get's compressed
pretty much around the spacecraft (it's not just the spacecraft that
"compressed" due to speed but the entire Universe is compressed as well
- ie. for a photon, the Universe doesn't exist; it  has 0 length :).
This means that your 1atom/m3 of space actually get's pretty large - I
can't provide you with a value because I'm too lazzy to calculate it
right now. :)
PS Relativity states that spacetime "compression" is relative to the
frame reference. For a spaceship a universe will not be compressed but
when you accound time dialation, the spacetime will _appear_ to be
compressed.
                spacetime "compression" + time dialation = k <- some
                                                                constant
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