<div dir="ltr"><div><div><div>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.<br>
<br></div>This should be possible with a smart laser modulation, I think.<br><br></div>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.<br>
<br></div>We could harness some clusters, I think. Even with small probes, we could catch some escaping cows.<br><div><div><div><br></div></div></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Sun, Dec 30, 2012 at 1:00 AM, Anders Sandberg <span dir="ltr"><<a href="mailto:anders@aleph.se" target="_blank">anders@aleph.se</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On 2012-12-29 10:19, BillK wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
So much for humanity expanding throughout the universe.<br>
If humanity is ever able to reach another galaxy, we'll only get to<br>
the nearest few out of 200 billion galaxies.<br>
</blockquote>
<br></div>
Sure. Just 2e22 stars. And about a hundred times as much gas and dark matter.<br>
<br>
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.<br>
<br>
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.<span class="HOEnZb"><font color="#888888"><br>
<br>
-- <br>
Anders Sandberg<br>
Future of Humanity Institute<br>
Oxford University</font></span><div class="HOEnZb"><div class="h5"><br>
______________________________<u></u>_________________<br>
extropy-chat mailing list<br>
<a href="mailto:extropy-chat@lists.extropy.org" target="_blank">extropy-chat@lists.extropy.org</a><br>
<a href="http://lists.extropy.org/mailman/listinfo.cgi/extropy-chat" target="_blank">http://lists.extropy.org/<u></u>mailman/listinfo.cgi/extropy-<u></u>chat</a><br>
</div></div></blockquote></div><br></div>