[meteorite-list] seti

From: Neil Caliva <ncaliva_at_meteoritecentral.com>
Date: Mon Nov 14 23:25:29 2005
Message-ID: <BAY22-F5A82BEF89D1E0E6876A60B15D0_at_phx.gbl>

Thanks for all the emails and links. It seems like such a waste to be the
only intelligent life in the universe, if thats so.

>From: "Sterling K. Webb" <kelly_at_bhil.com>
>To: Neil Caliva <ncaliva_at_hotmail.com>,
> meteorite-list_at_meteoritecentral.com, Darren Garrison
><cynapse_at_charter.net>, Jonathan Gore <jonathan525@earthlink.net>
>Subject: Re: [meteorite-list] seti
>Date: Mon, 14 Nov 2005 01:06:42 -0600
>
>Hi,
>
>
> There is a huge difference between
>detecting and discriminating an INDIVIDUAL
>radio signal from the Earth at interstellar
>distances on the one hand and merely
>detecting the totality of the Earth's
>radio signals at interstellar distances,
>on the other.
>
> Surrounding the Earth is a shell of
>EM transmissions out to a radius of 94
>light years. At the outer edge of that
>shell is Marconi's transmission of the
>letter "S" in 1901. Faint. But at radii
>of 84 light years and again at 57 light
>years, quantum leaps in intensity occur.
>(That's the onset of commercial radio
>and commercial television respectively.)
>
> The TOTAL radio emissions of the Earth
>are TWICE AS BRIGHT AS THE SUN. Every radio
>astronomer within that inner 100 light year
>sphere (if there ARE any radio astronomers
>"out there") is confronted with the paradox
>of a normal type G star which has an optically
>invisible companion which has twice the
>luminosity in the radio spectrum as the
>visible star! Studies of the motion of the
>"invisible companion" would show it to be
>in orbit around the normal star.
>
> There is only one possible explanation
>of an optico-radio binary star. That is, that
>the normal star has a planet which is SCREAMING
>its head off in the radio spectrum! And it's
>only getting noisier with every passing year,
>louder and louder! As for directed transmissions,
>we already have interplanetary radar signals
>that are 10,000,000,000 times brighter than
>the Sun!
>
> As an interstellar neighbor, the Earth is
>kind of like that guy on the subway toting
>the 300 pound ghetto blaster! If you have any
>hope that the aliens haven't noticed us yet,
>you can forget all about them.
>
> Which is why I find the beautiful dream of
>SETI to be just that: a beautiful dream. A Kardashev
>Level Two civilization (one which utlizes the full
>energy resources of an entire solar system) should
>be roughly the radio luminosity of a QUASAR! It
>would be "visible" in the EM spectrum at 100,000
>light years distant (if the civilization survived
>for that long).
>
> In 300 to 500 years, WE will (I hope) be a
>fledging Kardashev Level Two civilization. There
>will be millions of powerful comet-hunting radars
>in the Kuiper Belt and the Inner Oort Cloud, billions
>of radar beacons on every rock in the system,
>trillions of TV channels (how many re-runs of the
>ancient classics like The Brady Bunch?), and an
>inconceivable number of interplanetary cell phones
>(most of them on hold and playing space elevator
>music). Our solar system will probably be the
>brightest radio source in the Milky Way Galaxy.
>
> If there are any aliens out there, you know,
>great wise space-traveling advanced aliens, WHERE
>are their home systems and WHY are there no bright
>artificial radio sources? If there is an interstellar
>civilization or many such, you shouldn't be able
>to point a radio detector to the heavens without
>having your ears blown off. We should be awash in
>a cacophony of re-runs of the Arcturian "I Love
>Lucy" or the Tau Ceti "Milton Berle."
>
> I say this as a person who, for many years,
>DONATED more money to SETI than I spent on, say,
>buying meteorites, or even books, so I was not
>without hope in that dream. But I have concluded
>that it was just that... a dream.
>
>
>Sterling K. Webb
>-----------------------------------------------
>Neil Caliva wrote:
>
> > Hi List,
> >
> > How far could our EM signals generated by humans be detected?
> >
> > Sorry if this is off topic!!!
> >
> > -NC
>
>

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Received on Mon 14 Nov 2005 11:25:26 PM PST