Re: Aliens within four years!
R Kym Horsell <[email protected]>
| Newsgroups | sci.skeptic,alt.paranormal,alt.atheism |
|---|---|
| Organization | BWH Usenet Archive (https://usenet.blueworldhosting.com) |
| Message-ID | <[email protected]> |
In alt.paranormal JTEM <[email protected]> wrote: > On 8/8/26 6:36 AM, R Kym Horsell wrote: > >> You can have a great time making fun of JTEM and his >> claims like "we live in Africa now because no-one had a >> reason to leave" > > We had reasons to leave. ... Animals and people en masse drift around expanding like gas molecules out of an open bottle of pop. They reproduce without bound to a point food starts to get noticably scare where they are so the move on down the coast a bit. A few 1000s ys of random drifting and they're all the way across the Pacific. Hell. After a couple 1000s ys they're thinking time to go and colonise the next planet over. It must be like a universal law or something. Hold the presses. Call it sommin catchin like "galactic diffusion". -- THE FERMI PARADOX AND THE AURORA EFFECT: EXO-CIVILIZATION SETTLEMENT, EXPANSION AND STEADY STATES Jonathan Carroll-Nellenback Department of Physics and Astronomy, University of Rochester, Rochester, New York, 14620 Adam Frank Department of Physics and Astronomy, University of Rochester, Rochester, New York, 14620 arXiv:1902.04450v2 [physics.pop-ph] 5 Feb 2020 ABSTRACT We model the settlement of the galaxy by space-faring civilizations in order to address issues related to the Fermi Paradox. We are motivated to explore the problem in a way that avoids assumptions about the `agency' (i.e. question s of intent and motivation) of any exo-civilization seeking to settle other planetary systems. We begin by considering the speed of an advancing settlement front to determine if the galaxy can become inhabited with space-faring civilizations on timescales shorter than its age. Our models for the front speed include the directed settlement of nearby settleable systems through the launching of probes with a finite velocity and range. We also include the effect of stellar motions on the long term behavior of the settlement front which adds a diffusive component to its advance.