[extropy-chat] Sasha is alive!

[Eugen Leitl]

On Thu, Jan 04, 2007 at 06:52:41AM -0500, Joseph Bloch wrote:

> Other choices? You could build yourself a spaceship and start traveling 
> in a long elipse at relativistic speeds, arriving back to Earth in the 

Do you expect manned relativistic flight in the next 30-40 years?
Using which propulsion techniques? What about radiation background?
(Interstellar hydrogen is pretty bright at relativistic speeds).
Machines have none of these issues.

> (relative) future. It does seem a tad more expensive than cryonics, but 
> certainly a surer way of making it to the future (and perhaps avoiding a 
> "hard takeoff" singularity into the bargain!).

You can't avoid it. You will run smack into its expansion
wavefront when you head back. (You can't actually even escape
it, long-term, because it can accelerate way faster than you
and reach higher velocities than you, and it will colonize
systems ahead of you as it overtakes you).

Perhaps not really an option, even for the future.

-- 
Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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