Re: correction Fermi 2

Date: Fri Nov 16 2001 - 11:37:51 MST

Spike writes:

> Im heading out on a road trip, but perhaps some
> of us can write up rubuttals and objections, or perhaps just
> some sketches of how interstellar travel could be accomplished,
> given a few hundred more years of technological advance. I
> feel we really are that close to that lofty accomplishment, within
> centuries. spike

Frank Tipler has a good article on mature interstellar travel at (apparently a shorter version
was published in Wired).


   The year is 2100. AI's and human downloads have begun to explore and
   colonize interstellar space. The spaceships carrying the AI's and
   human downloads are tiny, massing no more than a kilogram. Quantum
   computers, which can code more bytes of information in 400 atoms than
   there are atoms in the entire visible universe, do not require much
   mass. An entire simulated city with thousands of humans and AI's can
   be coded in a few grams. And a tiny spaceship has a huge advantage
   over the ponderous rockets of today. Powered by matter- antimatter
   annihilation, such tiny spaceships can reach 90% of lightspeed with
   only a few kilograms of fuel. At such a speed, the nearest star,
   some four and one-half light years away, will be reached in only five
   years. Acceleration to 90% of lightspeed will be very fast, because
   the downloads and AI's will be impervious to acceleration. Humans not
   living in computers can take only a few gravities of acceleration,
   and can take that small acceleration only for a short time. Simulated
   humans will experience only the usual one gravity acceleration in
   their simulated environment. Human downloads have such a natural
   advantage over present-day humans in the environment of space, that
   it is exceedingly unlikely non-downloaded humans will ever engage
   in interstellar travel. The stars are to be the inheritance of our
   downloaded descendants, of the children of our minds rather than
   our bodies.

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