AM> 632/107
 AM> GJO> What amuses me Adam, is that you introduce some extremely abstract
 AM> idea :)
 AM> GJO> without any scientific basis claiming which you claim is possible
 AM> while
 AM> GJO> claiming impossible travel beyond our solar system with current
 AM> spacetime
 AM> GJO> theories.  Firstly, if humans ever did go to the stars, under 
current
 AM> GJO> physical limitations it would be a one way journey.  U.F.O.s would
 AM> more
 AM> GJO> likely represent short distance crafts used at the destination.  
ow
 AM> for t
 AM> GJO> primary craft, where are not impossibilities.  'Huge accelerations' 
d
 AM> not
 AM> GJO> pose any problem...you can accelerate at 1g (and simulate earths
 AM> gravity o
 AM> GJO> your craft solving lots of potential physical complications) and
 AM> accelerat
 AM> GJO> up to the speed of light in around 1 year.  Time dilation can be a
 AM> benefit
 AM> GJO> and produces no problems on the one way trip...it can even be used 
to
 AM> redu
 AM> GJO> the trip time. and finally collision between particles is not an
 AM> impossibl
 AM> GJO> feat to overcome.  The density between the stars is about 1 atom 
er
 AM> cubic
 AM> GJO> metre or so, hardly an impossibility for construction design.
 AM> First of all, when Columbus traveled to the West Indies he wasn't
 AM> thinking of a one way trip. Comunication is the bases of human
 AM> comunity and if it's eliminated, the comunity stops to exist. A one
 AM> way trip would couse just that. And you can't accelerate to c -
 AM> molecules breaking up and stuff can cause a problem :) I don't think
 AM> your exlonation has any scientific explonation basis either. At a
 AM> constant acceleration of 1g it would require tremondous ammounts
 AM> of energy at speed over 0.5c. And travelling at 0.99c, the space
 AM> get's compressed pretty much around the spacecraft (it's not just
 AM> the spacecraft that "compressed" due to speed but the entire
 AM> Universe is compressed as well - ie. for a photon, the Universe
 AM> doesn't exist; it  has 0 length :). This means that your 1atom/m3
 AM> of space actually get's pretty large - I can't provide you with a
 AM> value because I'm too lazzy to calculate it right now. :)
 AM> PS Relativity states that spacetime "compression" is relative
 AM> to the frame reference. For a spaceship a universe will not be
 AM> compressed but when you accound time dialation, the spacetime
 AM> will _appear_ to be compressed. spacetime "compression"
 AM> + time dialation = k <- some
 AM> constant
 Hello Adam,
       Firstly, the sociological disadvantages of isolation you stated at far 
from impossible limitations.  So this in no way dismisses the possibility of 
long distance space travel.
       As for the science, you still got it wrong.  It is a tremendous amount 
of energy reaching 0.99c, however it is far from impossible.  Using positron 
-electron annihilation, we would need to carry 14.1 times the payload mass to 
reach this velocity in this matter-anti matter mix.  Clearly not impossible 
when considering that the space shuttle has a mass to payload mass ration far 
greater than this.  If we carry the fuel to the system to slow down on a one 
way journey we need the square of this number, so 199 is the ratio.  So for a 
1000 ton cargo, we need 199,000 tons of e+e- mix.  With current technology, 
due to the Coulomb repulsion we however must use a hydrogen-anti hydrogen mix 
but again there is no impossibility (and this is carrying your own fuel 
remember!) 
        So the space gets compared....so what?  the only danger this produces 
, is that it increase the cosmic ray flux on the spacecraft by about 7.1X 
...again nothing impossible.  Don't think for a second that this compression 
in any way effects the structure of the spacecraft..because it does not.  oh 
and the time dilation does not hurt you too. 
--- FMail 1.22
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