[ExI] Expansion of the Universe

[Tomaz Kristan]

The fastest way to go around should be on the tip of the laser beam, which
prints a machine into the dust of a distant planet. A machine which do the
same. And so forth, across the galaxies.

This should be possible with a smart laser modulation, I think.

Now, what would I print with such a laser in a distant galaxy, bound to
escape me?I would print a machine, which divides this galaxy in two halfs
or something. One "half" starts to move toward us, the other "half" are
gamma rays escaping from us.

We could harness some clusters, I think. Even with small probes, we could
catch some escaping cows.



On Sun, Dec 30, 2012 at 1:00 AM, Anders Sandberg <anders at aleph.se> wrote:

> On 2012-12-29 10:19, BillK wrote:
>
>> So much for humanity expanding throughout the universe.
>> If humanity is ever able to reach another galaxy, we'll only get to
>> the nearest few out of 200 billion galaxies.
>>
>
> Sure. Just 2e22 stars. And about a hundred times as much gas and dark
> matter.
>
> According to our calculations (they are in my paper with Stuart
> Armstrong), what matters the most is expansion velocity, not how long we
> delay. Since the remote galaxies will be reached in billions of years
> anyway a delay of a million years does not matter much if it leads to a bit
> faster probes. This is also favors small and fast probes with few
> generations and high fan-out rather than big and slow ones that spread
> shorter distances.
>
> An important question is what you want to use the mass for. If you want to
> turn it into hedonium and do not care about long-range communications you
> should try to get as much as possible. If you want a cohesive civilization
> you will not need much beyond a supercluster anyway, since the other
> superclusters will drift apart and lose causal contact with you. So
> hedonists might be more motivated to spread far and wide.
>
> --
> Anders Sandberg
> Future of Humanity Institute
> Oxford University
>
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