<p>On May 26, 2013 10:34 AM, "Eugen Leitl" <<a href="mailto:eugen@leitl.org">eugen@leitl.org</a>> wrote:<br>
> I'm arguing physics, not specific<br>
> technology.</p>
<p>> The question is not about feasibility but economics.</p>
<p>Physics informs feasibility. Technology informs<br>
economics.</p>
<p>Space travel can get a lot cheaper than it is now.<br>
Using current prices to argue economics is invalid.</p>