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Jill Tarter and the Allen Telescope Array

An anonymous reader writes "Today's interview with Jill Tarter of the SETI Institute (and Carl Sagan's inspiration for the main character of his novel Contact), outlines the forthcoming search capabilities of the large Allen Telescope Array. Their thousand-fold expanded search must find promising places to point 350 radio dishes. Outside San Francisco, the array spans an equivalent 8 football fields. Their new catalog, called HabCat, identifies all potentially habitable hosts for complex life within 450 light-years from Earth. Of the billions of places to point in the sky, their A-list total: 17,129. Start at Vega."

147 comments

  1. Oh no! by richie2000 · · Score: 1, Funny

    Imagine our embarrassment when They finally arrive and want to be taken to our leader and we realize we have to let them meet George W. It's going to be Mars Attacks all over again...

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    1. Re:Oh no! by Anonymous Coward · · Score: 0

      Imagine our embarrassment when They finally arrive and want to be taken to our leader and we realize we have to let them meet George W. It's going to be Mars Attacks all over again...

      That's assuming they choose to land in the USA off course. Considering that the USA covers only a minor piece of the worlds landmass, it's statisticly more likely they will land somewhere else entirely.. like Red China or India. Not sure if it would be any better thought, politicans are generaly crocks no matter where they are from.

    2. Re:Oh no! by sigep_ohio · · Score: 1

      well by your thinking, the aliens would really land in the oceans and we'd be partying it up 'Abyss' style with them. International waters means no drinking laws, woo hoo! of course, this is all contingent on there being aliens and that they are peaceful, party animals.

      i would even be willing to teach them beer die.

      --
      Beer Die is the game of champions Learning To walk my own path.
    3. Re:Oh no! by T.E.D. · · Score: 2, Flamebait
      That's assuming they choose to land in the USA off course. Considering that the USA covers only a minor piece of the worlds landmass, it's statisticly more likely they will land somewhere else entirely.. like Red China or India. Not sure if it would be any better thought, politicans are generaly crocks no matter where they are from.


      First off, the USA is not the largest country in area, but it is in the top 4. The only larger ones are Russia, China, and Canada. India is smaller. It should also be pointed out that Canada is contiguous with the US along a very long border, creating in effect one very large block.

      Secondly, anyone smart enough to travel that distance despite the physics problems involved would probably also be smart enough to land in the place putting out the most energy (assuming they want to find "our leader"). That would be the US, hands down.

      Just a simple look at artificial lighting at night would lead one to conclude that "leaders" would most likely be found on the NE corridor in the US, or in the Belium-Netherlands area in europe. Japan's an outside possibility. But Russia, China, and India are about the last places you'd go.
    4. Re:Oh no! by CrazyDuke · · Score: 1

      If they're really smart, they'll watch the radio frequency traffic comming in and avoid the place that has thermonuclear weapons, anti-balistic missiles, the biggest airforce in the world, and a trigger happy government.

      --
      Any sufficiently advanced influence is indistinguishable from control.
    5. Re:Oh no! by T.E.D. · · Score: 1

      ...unless they want to install themselves as our new "leaders". In that case, they'd head straight for that place. :-)

    6. Re:Oh no! by Anonymous Coward · · Score: 0

      Required anti-US comment.

    7. Re:Oh no! by laughing_badger · · Score: 1
      anyone smart enough to travel that distance despite the physics problems involved would probably also be smart enough to land in the place putting out the most energy (assuming they want to find "our leader"). That would be the US, hands down.

      Right with you on the logic. However, consider a civilization within which the rich enjoy a pastoral livestyle and technology capable of recycling 'wasted' energy, whereas the poor must live in crowded environs built with older 'wasteful' technology. The result - they would start looking for our leader in the middle of Russia.

      There just isn't a way that we can predict what an aliens opinions would be, since we do not know anything about the environment that they call 'normal'.

      --
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    8. Re:Oh no! by Anonymous Coward · · Score: 0
      "...anyone smart enough to travel that distance despite the physics problems involved would probably also be smart enough to land in the place putting out the most energy..."
      Okay, explain again why they're trying to land on the sun?

      Personally, I figure that if they're intercepting our radio signals, they're going to beeline to New York, and try to move in with the cast of "Friends." Hopefully, their disappointment won't rise to "kill-em-all" levels.
  2. Ok... by cybermace5 · · Score: 0, Funny

    How soon before we hear about suspicious noisy thumping sounds from a point in outer space, which turn out to be encoded plans for a strange device?

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    ...
    1. Re:Ok... by Blaine+Hilton · · Score: 1
      I'm not too interested in "little green men", but your $1,000 job reward sounds interesting!

      Go calculate something.

    2. Re:Ok... by cybermace5 · · Score: 1

      Yeah I've had that up for a while. Not too many real bites yet. Guess it would help if I had my coffee before posting on here, so I don't make "duh, Contact, huhuhuh...." comments.

      --
      ...
  3. Allen Telescope Array by Anonymous Coward · · Score: 3, Funny

    hehehe... I just read it as "Alien Transport Array".

    Damn... Too much coffee....

  4. hehe by Anonymous Coward · · Score: 0

    now we can watch the aliens take showers

    hehe takes peeping tom to a new level

  5. Named for Microsoft founder Paul Allen... by leshert · · Score: 2, Funny

    Is this proof that not everything that comes out of Microsoft is evil, or is it just a way to expand the market for Windows? :-)

    1. Re:Named for Microsoft founder Paul Allen... by .@. · · Score: 4, Informative

      You're joking, of course. However, before someone makes some MS-bashing comment, the system the SETI Institute will deploy at the ATA runs mostly on Linux. Debian, at the moment. What isn't Linux is Solaris, and that's mainly the control and data archiving system.

      --
      .@.
    2. Re:Named for Microsoft founder Paul Allen... by richie2000 · · Score: 1
      the system the SETI Institute will deploy at the ATA runs mostly on Linux.

      And you can find the ATA drivers here. ;-)

      --
      Money for nothing, pix for free
  6. Whats with the measurements?? by ciroknight · · Score: 2, Interesting

    Why would we want to catalog habitable places within 450 light years, when our current space exploration can't get past our moon!?

    Also, can anyone explain the difference between a parsec and a light year???? I know its something about the arcsecond of the something and the whatchamagigger but yeah, thats about that...

    --
    "Victory means exit strategy, and it's important for the President to explain to us what the exit strategy is." G.W.Bush
    1. Re:Whats with the measurements?? by fgb · · Score: 3, Informative

      1 parsec = 3.26 light years

    2. Re:Whats with the measurements?? by richie2000 · · Score: 4, Informative
      Easy. A light year is like a leap year, except we set it on fire to light up the place a bit. A parsec is a fast-paced multiplayer cross-platform 3D Internet space combat game.

      Or, it could be that a light year is the distance that a photon would travel on a standard solar year, in vacuum, while a parsec is the distance from which the radius of the earth's orbit would subtend an angle of one second of arc. One parsec is roughly 3.26168 light years.

      Google is mother, Google is father. Worship Google.

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    3. Re:Whats with the measurements?? by vofka · · Score: 3, Informative

      One Parsec = 3.26 Light Years.

      More technically, One parsec is the distance at which one astronomical unit subtends one second of arc.

      See: This Site for a definition of the Parsec.
      See: This Site for a definition of the Light Year

      --
      Disclaimer: I meant what I thought, not what I wrote! What? You can't read my Mind? Oh dear!
    4. Re:Whats with the measurements?? by papadiablo · · Score: 3, Insightful

      First off, we have gotten past our moon with our manless space exploration.

      Secondly, just because we discover a signal coming from a planet 450 light years away doesn't mean we have to go there. The knowledge contained in that signal would be enough to warrant such cataloging. If that civilization is anything like ours, they might think to broadcast an "encyclopedia galactica" like Brian McConnell suggests in his book Beyond Contact.

    5. Re:Whats with the measurements?? by sigep_ohio · · Score: 1

      is it the earth and alpha cetauri or is it the sun and alpha centauri. i know that it really doens't matter in the end, but i am curious. it would seem dumb to me to measure it from the earth, but hey i am just an alcoholic... i mean college student.

      --
      Beer Die is the game of champions Learning To walk my own path.
    6. Re:Whats with the measurements?? by jkrise · · Score: 1

      Especially considering we did find a habitable planet 450 light years away, and started travelling NOW, and travelled at the speed of light, we'd still arrive 450 years from now.

      Very dead, I suppose. Or we'd need to travel in families, reproduce and multiply enroute, and our great-great-great-great-great-great-grandchildren MIGHT make it! Wow... We first need to research extending life spans first.

      --
      If you keep throwing chairs, one day you'll break windows....
    7. Re:Whats with the measurements?? by Scaba · · Score: 0, Flamebait

      I don't know where you live, but if that civilization is anything like ours (the US), the signal is the inanities of everyday life: either toothpaste commercials, warlords rallying the public (i.e., Hitler, Bush, et al.) or reruns of old "I Love Zgrxqklop" episodes. We hate knowledge and learning here in the States - and are in fact proud of our ignorance - so we ain't be broadcasting no encyclopedias anytime soon.

    8. Re:Whats with the measurements?? by Anonymous Coward · · Score: 0

      I recommend we research engine and colonization technology first. That way, we'll be able to grab all the *choice* planets before the burgeoning alien empires nearby can get their slimy ovipositors on them!

      However, defending our newly colonized worlds might be troublesome, unless we engage in an accelerated weapons program. Spinal mounts! We need spinal mounts, heavy turrets, and dreadnought hulls!

    9. Re:Whats with the measurements?? by Anonymous Coward · · Score: 0

      Yeah, are those american football fields, or real football fields (soccer to americans)? And how many aircraft carriers equals a football field? Are football fields part of the metric system, or are we trying to switch to some other measurement system?

    10. Re:Whats with the measurements?? by pmz · · Score: 1

      "subtend" escaped my high-school geometry education. At first glance, it could mean serving small candy submarines at a party. However, m-w.com, crushed my imagination:

      Main Entry: subtend ... 1 a : to be opposite to and extend from one side to the other of <a hypotenuse subtends a right angle> b : to fix the angular extent of with respect to a fixed point or object taken as the vertex <the angle subtended at the eye by an object of given width and a fixed distance away> <a central angle subtended by an arc> c : to determine the measure of by marking off the endpoints of <a chord subtends an arc>

    11. Re:Whats with the measurements?? by BrokenHalo · · Score: 1
      just because we discover a signal coming from a planet 450E light years away doesn't mean we have to go there

      Just as well, isn't it? :-)

    12. Re:Whats with the measurements?? by Anonymous Coward · · Score: 0

      Nahh...it would never happen. The EIAA (Encyclopedia Industry Artists Association) forbids P2P (Planet-to Planet) filesharing.

    13. Re:Whats with the measurements?? by joeXray · · Score: 1

      Well I must have one lame internet connection, because I can't get those Canadian web sites to work.

      I much perfer Eric's definitions of Light Year and Parsec.

    14. Re:Whats with the measurements?? by uberdave · · Score: 1

      I was wondering the same thing (except with Canadian football fields which are longer and wider (four downs to make ten yards? Sheesh!)).

      Since all of these fields are based on imperial measurements, I say we ditch them all, and use volleyball courts, which are metric.

    15. Re:Whats with the measurements?? by richie2000 · · Score: 1

      You're right, they were better. Alas, they didn't show up high enough in my hasty Google search. Eric needs a revolution to improve his Goggle ranking. ;-)

      --
      Money for nothing, pix for free
    16. Re:Whats with the measurements?? by YOU+LIKEWISE+FAIL+IT · · Score: 0
      Never mind, I'm sure his next opus, 'A New Kind of Pagerank' will hit the vanity press any day now.

      -- YLFI

      --
      One god, one market, one truth, one consumer.
  7. Looking at the tools... by WegianWarrior · · Score: 2, Interesting

    ...a network of 350 radio antenna dishes. Called the Allen Telescope Array (or ATA), the network ties together 6.1 meter (~20 foot) diameter dishes for a total surface area as large as eight football fields.

    I thought that the baseline of a telescope array was more important than the collecting area - or is that just when you work in the visible wavelenghts? Can anyone set me straight on that?

    --
    Everything in the world is controlled by a small, evil group to which, unfortunately, no one you know belongs.
    1. Re:Looking at the tools... by vofka · · Score: 5, Informative

      Have a look at This Introduction to Very Long Baseline Interferometry at the Jodrell Bank Obervatory website - that will tell you (almost) everything you ever wanted to know about VLBI, and then some!!

      --
      Disclaimer: I meant what I thought, not what I wrote! What? You can't read my Mind? Oh dear!
    2. Re:Looking at the tools... by zer0vector · · Score: 3, Informative

      Each measure is important in its own way. Large baselines give you greater resolution, or the ability to distinguish between objects that are very close together. Collecting area gives you greater sensitivity, or the ability to image fainter and farther objects. These apply to all wavelengths, from the radio up through x-ray.

      --

      ----
      Striving to put right what once went wrong, and hoping each time that his next leap, will be the leap ho
    3. Re:Looking at the tools... by LMCBoy · · Score: 1

      I thought that the baseline of a telescope array was more important than the collecting area - or is that just when you work in the visible wavelenghts?

      The baseline is more important if angular resolution is what you are after. If you just want to detect very faint signals, then you want the biggest collecting area that you can afford. In the case of SETI, angular resolution is not required, they just want to get the signal.

      The wavelength doesn't enter into it, other than the fact that interferometry is insanely difficult for optical wavelengths (because you have to combine the optical paths from the different telescopes with a precision that is a small fraction of the photons' wavelength). We'll probably never see a working optical LB interferometer in our lifetimes; near infrared seems to be the practical limit.

      --
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    4. Re:Looking at the tools... by ch-chuck · · Score: 2, Funny

      Called the Allen Telescope Array (or ATA),

      We much prefer the Scientists Concerned with Space Intelligence (or SCSI) Array for serious work , even if it is a bit more expensive.

      --
      try { do() || do_not(); } catch (JediException err) { yoda(err); }
  8. In some ways, the catalog is a waste of time. by Anonymous Coward · · Score: 3, Interesting

    The guesses at inhabitable worlds sure fits in with assumptions of Trekkies. It assumes that other life on other planets would be humanlike and thus need a similar environment.

    The usefulness of looking for Earthlike worlds to find life is marginal at best: it is based on generalizations from a sample set of one. Yes, just one.

    I would guess that if we ever find "life" out there, it is going to be like nothing we expected in a place we never expected it. But that is just my guess, as after all we have no idea.

    1. Re:In some ways, the catalog is a waste of time. by sigep_ohio · · Score: 1

      i think they plan on looking at more than just the planets on their A-list. it seems to me that they are looking for planets like our own first, then moving on to other possibilities.

      --
      Beer Die is the game of champions Learning To walk my own path.
    2. Re:In some ways, the catalog is a waste of time. by drgroove · · Score: 4, Funny

      The guesses at inhabitable worlds sure fits in with assumptions of Trekkies. It assumes that other life on other planets would be humanlike and thus need a similar environment.

      The only differences being that, while human like, the aliens have blue skin and green afros. Oh, and if we were to visit the surface of their world, the lowest-ranking member of the party would always be turned into a rock, or eaten by a giant alien squid, or killed in hand-to-hand combat with their greatest warrior.

    3. Re:In some ways, the catalog is a waste of time. by Glock27 · · Score: 5, Insightful
      It assumes that other life on other planets would be humanlike and thus need a similar environment.

      There is more to it than that. Biochemists have done substantial analysis regarding what other chemical families might support life. It looks as though with the periodic table as it is, carbon is the only good choice for rich biochemistry. For carbon life to develop, liquid water appears necessary. So, you have narrowed the search volume considerably by only considering stars that would likely have a planet in the "liquid water" sweet spot, while not getting fried by hard radiation at the same time.

      Further, a planet must exist long enough for evolution to occur. That eliminates a great number of stars as well - many just don't last long enough.

      As another poster pointed out, that at least provides a starting point on where to look.

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    4. Re:In some ways, the catalog is a waste of time. by Anonymous Coward · · Score: 0

      Do you think the lowest ranking member should wear a red shirt... that way, the alien would KNOW which is the lowest ranking member?

    5. Re:In some ways, the catalog is a waste of time. by Sanity · · Score: 0
      Biochemists have done substantial analysis regarding what other chemical families might support life.
      And in one implicit assumption (that all life must be based on the same kind of chemical interactions that we are) you have duplicated the mistake made by these SETI people.

      For all we know, the universe could be full of intelligent life based, not on chemical interactions, but on quantum interactions, or perhaps complex interactions of particles based on gravity, or perhaps some subtle physical effect we don't even know about yet.

    6. Re:In some ways, the catalog is a waste of time. by Bohnanza · · Score: 1
      The guesses at inhabitable worlds sure fits in with assumptions of Trekkies.

      They are not "assumptions". Aliens look like humans on Star Trek because they are portrayed by humans.

      --

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    7. Re:In some ways, the catalog is a waste of time. by Glock27 · · Score: 2, Insightful
      And in one implicit assumption (that all life must be based on the same kind of chemical interactions that we are) you have duplicated the mistake made by these SETI people.

      It is by no means "must" - it is simply considered most likely. The scientists are going with the best probabilities based on, surprise, the science we know.

      For all we know, the universe could be full of intelligent life based, not on chemical interactions, but on quantum interactions, or perhaps complex interactions of particles based on gravity, or perhaps some subtle physical effect we don't even know about yet.

      If the universe is "full" of such life, it is not transmitting in the radio spectrum - we've already looked quite a few places, including empty space. There are fairly "obvious" physics-based frequencies at which to transmit, if you wish to communicate. If you don't wish to communicate, that is another kettle of fish...

      It is not that we haven't already listened in lots of directions, and to lots of things. So far, radio hasn't proven very fruitful.

      It may be that there is a instantaneous-super-quantum-gravitational-string (or something) form of communication that almost all civilizations acquire at some point beyond our current technology. That would certainly account for a large-scale radio silence. Of course, there are numerous other possibilities.

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    8. Re:In some ways, the catalog is a waste of time. by Hao+Wu · · Score: 1

      The one main point that you ignore makes everything you mentioned trivial and beside the point.

      What is needed is the existence of a radio transmitter, period. How it got there, who or what made it, and what we do about it are all secondary considerations.

      --
      I suggest you read Slashdot
    9. Re:In some ways, the catalog is a waste of time. by Fastolfe · · Score: 1

      or perhaps some subtle physical effect we don't even know about yet.

      If we don't know about it yet, it's unlikely that the effect will occur enough with a frequency or significance that life will evolve based on it.

      Likewise with your other points. These things are not noticable to ordinary matter, which makes it unlikely for these things to affect ordinary matter in such a way as to create life based on ordinary matter.

      It is possible that chemical-based life will evolve (probably deliberately) to some form of life based on more complex phenomena, but odds are, it's gone through that "chemical" phase first. It makes most sense to start our search there, one way or the other.

      No offense to you personally, but I trust the biologists and astrophysicists with PhD's a little more about what types of life might be out there than most Slashdot couch scientists. (Not that you're one, but a lot of Slashdot posters are asking the same questions, and I would really hope that the people paid to think about these things would have come up with these questions and satisfactory responses to them by now...)

    10. Re:In some ways, the catalog is a waste of time. by Sanity · · Score: 1
      It is by no means "must" - it is simply considered most likely. The scientists are going with the best probabilities based on, surprise, the science we know.
      Er, the science we know tells us that you can't deduce anything from a sample size of 1, which is exactly what these people are doing.
    11. Re:In some ways, the catalog is a waste of time. by Glock27 · · Score: 1
      you can't deduce anything from a sample size of 1, which is exactly which is exactly what these people are doing.

      No that is not "exactly what these people are doing", as has already been explained in some detail.

      The issue is broad physical/chemical/biological principles, not the exact track of life on Earth, per se.

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      Score: -1 100% Flamebait
    12. Re:In some ways, the catalog is a waste of time. by Sanity · · Score: 1
      No offense to you personally, but I trust the biologists and astrophysicists with PhD's a little more about what types of life might be out there than most Slashdot couch scientists.
      Well, I have a degree in Artificial Intelligence and have done quite a bit of work in the area of Artificial Life - so I think that makes me more qualified than most "couch scientists". I would also be wary of the opinions of biologists, their definition of life is probably quite narrowly based on what they have observed on this planet.
    13. Re:In some ways, the catalog is a waste of time. by Anonymous Coward · · Score: 0

      uh yah because an ai geek is so much better at figuring out alien biochemistry than a biochemist is..

    14. Re:In some ways, the catalog is a waste of time. by Fastolfe · · Score: 1

      More qualified how? What insight into alien biochemistry does a background in artificial intelligence give you?

      Remember that life forms evolving on other worlds are going to be doing so using the same elements that we deal with in chemistry today. It's highly unlikely that a JVM is going to spontaneously appear on some world and artificial life forms are going to evolve within it. More likely, it will be a traditional series of complex chemical reactions. Understanding how these molecules interact with each other is the foundation for understanding how life (in any form) can evolve. I really don't think your area of expertise makes you more qualified to speak on these matters than those who explicitly study these things. In fact, you've just secured your place among the Slashdot couch scientists I was speaking of. Everyone thinks they have experience in some slightly related field, so they must be smarter than those that have been studying and researching these specific things for dozens of years. Please concede the possibility that they are more qualified than you are to make these types of statements.

  9. how now brown cow by gr8gatzby · · Score: 0

    3800+ units and going strong. 4 years now. seti@home ow3ns my systems all your work units are belong to us

    --
    Hard work often pays off in time, but laziness always pays off right now.
    1. Re:how now brown cow by .@. · · Score: 4, Informative

      SETI@Home and the SETI Institute are two separate efforts.

      --
      .@.
  10. Echelon - the final frontier by Anonymous Coward · · Score: 0

    Is it really true? After decades of spying on their closest allies, the USA is now trying to eavesdrop on their closest aliens.
    What next? Will the Betelgeuse Recording Artists Association demand rights for anything that is recorded. Oh, right, that would be over-reacting to a few unathorised file transfers.

  11. Wow Signal. by thbigr · · Score: 1

    What does any one know about the Wow signal? Is it on the list? Has it ever been repeated? I met the guy who first heard that and the work they are doing is very interesting.

    --
    Come the revolution, the Bourgeois, Capitalistic, "A PARKING STICKER HOLDERS", will be first against the wall!
    1. Re:Wow Signal. by richie2000 · · Score: 5, Informative
      This article was linked from the article in the post.

      Excerpt:

      In the October 20 issue of The Astrophysical Journal, Gray and Simon Ellingsen, of Australia's University of Tasmania, report on new observations (partially supported by the SETI Institute) designed to test this idea. Their new try was made at the 26-meter radio telescope in Hobart, Tasmania. This southern hemisphere instrument could continuously follow for most of a day the patch of sky (in the constellation of Sagittarius) where the "Big Ear" was pointing when it found the 'Wow' signal. They made six 14-hour observations, and even though their telescope was rather smaller than the venerable Ohio State antenna, they still had sufficient sensitivity to find signals only 5% as strong as Wow's 1977 intensity. They also covered five times as much of the radio dial as the original "Big Ear" telescope.

      Bottom line? No dice. To quote from their article, "no signals resembling the Ohio State Wow were detected..." Of course, if the signal's repetition cycle were much longer than 14 hours, then even this careful experiment could have easily missed it. But as Gray and Ellingsen point out, if the signal were really this infrequent, then the chance to have found it in the first place was very slim.

      So was the Wow signal our first detection of extraterrestrials? It might have been, but no scientist would make such a claim. Scientific experiment is inherently, and rightly, skeptical. This isn't just a sour attitude; it's the only way to avoid routinely fooling yourself. So until and unless the cosmic beep measured in Ohio is found again, the Wow signal will remain a What signal.

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    2. Re:Wow Signal. by sigep_ohio · · Score: 1

      huh, what Wow signal. i want to hear it. is it anything like those annoying wow gossiple compilation cd's? cause if it is, i don't want to hear it then.

      --
      Beer Die is the game of champions Learning To walk my own path.
    3. Re:Wow Signal. by thbigr · · Score: 1

      To bad. The guys I talked to still thought it was a terestrial satalight not on any known list...

      --
      Come the revolution, the Bourgeois, Capitalistic, "A PARKING STICKER HOLDERS", will be first against the wall!
  12. Rights Violations? by blind_abraxas · · Score: 3, Funny

    If someone discovers that there are rebroadcasts of 40's baseball games with encoded secret plans,
    will the DMCA sue the aliens for rights violations? Shut E.T. down, Napster-style?

    --
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    1. Re:Rights Violations? by richie2000 · · Score: 1

      So you're saying that since they used their digits to encode the plans, that makes them digitally encoded? Sounds reasonable to me. :-)

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      Money for nothing, pix for free
    2. Re:Rights Violations? by Tenebrious1 · · Score: 1

      If someone discovers that there are rebroadcasts of 40's baseball games with encoded secret plans, will the DMCA sue the aliens for rights violations? Shut E.T. down, Napster-style?

      Well, MLB will probably sue; you know after every game, they always say something like "this game may not be broadcast without the written consent of the commissioner and MLB teams..."

      So the first contact will probably be some sort of extraterrestial fax requesting permission said...

      --
      -- If god wanted me to have a sig, he'd have given me a sense of humor.
    3. Re:Rights Violations? by jafuser · · Score: 1

      I know you're kidding, but it sometimes doesn't seem too far off target.

      Did you know the MPAA has been using stealth lobbying efforts to pass laws at the state level to enact a Super DMCA which criminalizes the possession of "unlawful communication and access devices"?

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  13. Han Solo's great achievement by Anonymous Coward · · Score: 1, Interesting

    In Star Wars, Han Solo made the Kessel run in less than twelve parsecs. It must be a measurement of time.

    Just as the micron is really something many kilimeters in length, according to Battlestar Galactica.

    1. Re:Han Solo's great achievement by ciroknight · · Score: 1

      Oh no... here it comes, so don't get mad...
      is the light year a measurement of distance, time or velocity ??? and since light years and parsecs can be converted, is the parsec a measurement of distance, time or velocity.. ARGH SLASHDOT!! you gave me a headache already -_-

      --
      "Victory means exit strategy, and it's important for the President to explain to us what the exit strategy is." G.W.Bush
    2. Re:Han Solo's great achievement by bdmarti · · Score: 2, Interesting

      I won't claim that there is hard science or good dialog behind the star wars films, but in the case of Han Solo and the Kessel run comment I would say his comment can be forgiven. Since the "kessel run" goes past a series of black holes, the closer you are to the black holes, the faster you'd need to go in order to avoid certain death. If you take a shorter path as Han suggests he did, you also must be going faster.

      Here's to the willing suspension of disbelief in the name of entertainment.

    3. Re:Han Solo's great achievement by zer0vector · · Score: 1

      In most studies of general relativity, which would apply when traveling near the speed of light, the speed of light is given the dimensionless value of c=1. Thus any measurement of distance is a measurement of time. Twelve parsecs of time is the time it takes light to travel twelve parsecs, or about 39 years.

      --

      ----
      Striving to put right what once went wrong, and hoping each time that his next leap, will be the leap ho
    4. Re:Han Solo's great achievement by ClippyHater · · Score: 1

      Light year is a measurement of distance. I think others have stated it elsewhere, but if you haven't seen theres: 1 light year is the distance it takes a photon to travel in one year (in vacuum). Speed of light * year = (? miles/year); so light year = ( ? miles/year) * (1 year/1 year) = ? miles. '?' used cause I'm too lazy to do the conversion for c (speed of light) to miles/year :).

    5. Re:Han Solo's great achievement by Teknogeek · · Score: 1

      Actually, that's just one of the two explainations for that.

      Another was that Han Solo was bragging to "uneducated rubes", and was basically pulling stuff out of his ass. According to this hypothesis, the "bullshit bragging" claim is supported by Obi-Wan Kenobi's knowing grin - he wasn't fooled, but Luke was.

      --
      I mod down anyone who uses M$ in their posts. I like to live on the edge.
  14. All this effort is going on the wrong planet by bcollier06 · · Score: 4, Insightful

    Wouldn't it be much more likely that a society advanced enough to be detectable across the vast reaches of interstellar space would find humans based upon primitive radio frequency transmissions? We might be able to just kick back and hope for our sake they don't take any of those hitler or vietnam broadcasts too seriously...

    While the possibility of extra-terrestrial life is a fascinating one, aren't there a lot more equally fascinating yet infinitely more practical aspects of space exploration to spend tons of money on?

    --

    -bcollier06

    1. Re:All this effort is going on the wrong planet by kindbud · · Score: 2, Interesting

      aren't there a lot more equally fascinating yet infinitely more practical aspects of space exploration to spend tons of money on?

      Yes there are, and we spend lots of money on those, too. What is your point? Are you merely unhappy with the way money is being apportioned among the various interests? Then why don't yopu study to become a space scientist so you can have some influence?

      --
      Edith Keeler Must Die
    2. Re:All this effort is going on the wrong planet by .@. · · Score: 2, Interesting

      Not if, in that advanced society, the majority of people believed the way you do. They'd just kick back and wait for us to find them.

      Only, we'd be expecting the same of them.

      Besides, I'd much rather see "tons of money" (which is privately donated, by the by) spent on this than the way we recently spent seventy-five billion (let that rattle around in your head a bit: Seventy. Five. BILLION.) dollars in the Middle East.

      --
      .@.
    3. Re:All this effort is going on the wrong planet by bcollier06 · · Score: 1

      My point is that while you think we spend a "lot" of money on these things, I believe our space programs in general are underfunded. Any time you have a limited amount of resources you must take into account this fact and try to put it to the greatest possible use. I just do not see how this project amounts to a practical use of funds.

      --

      -bcollier06

  15. Rock Band? by Mr.Dippy · · Score: 0

    "Jill Tarter and the Allen Telescope Array" sounds like an awesome 80's progressive rock band. Hello Cleveland!! Are you ready to rock?! Give it up for Jill Tarter and the Allen Telescope Array!!!

    --


    -Dipster
  16. Not the inspiration for Contact... by DShard · · Score: 4, Interesting

    is what she said in an interview in discover magazine. I can't remember which month but it was some time recently. She said she had asked Carl about this and he said the inspiration was himself.

    1. Re:Not the inspiration for Contact... by stephenb · · Score: 2, Funny

      This can't be right. Jodi Foster looks nothing like Carl Sagan. ;-)

    2. Re:Not the inspiration for Contact... by .@. · · Score: 2, Interesting

      She wasn't the insrpiration for the movie itself, no. That was Carl Sagan and his book of the same name. However, there are several characters in the movie that bear much more than a passing resemblance to folks who actually work at the SETI Institute.

      --
      .@.
    3. Re:Not the inspiration for Contact... by kevlar · · Score: 3, Insightful

      Authors routinely deny claims like this because they are afraid of being sued.

    4. Re:Not the inspiration for Contact... by SETIGuy · · Score: 3, Funny

      He also said I wasn't the inspiration for "Scientist with Bad Haircut #3" but the resemblance (especially in Jill's case) must be more than coincidental.

    5. Re:Not the inspiration for Contact... by stanwirth · · Score: 1

      Oh, she WISHES. Everybody who was at Cornell during CS's "billyuns and billyuns" phase knows that "the inspiration for Contact" was every "ambitious" female grad student he'd ever bedded.

  17. Allen Telescope Array? by deander2 · · Score: 4, Funny


    Am I the only one who read that as "Alien Telescope Array"? :P

    I need more cafffeeeeeeennee...

    1. Re:Allen Telescope Array? by hswerdfe · · Score: 1
      Am I the only one who read that as "Alien Telescope Array"?

      no your not.
      I need more cafffeeeeeeennee...

      your not the only one who needs more of that...sweet nectar of life...
      sleeps not all its cracked up to be you know
      --
      --meh--
  18. *cough* by Anonymous Coward · · Score: 0

    Especially considering we did find a habitable planet 450 light years away, and started travelling NOW, and travelled at the speed of light, we'd still arrive 450 years from now.

    Nope, not at all. Google search Time Dilation for the reason why.

  19. Divine Intervention by kevlar · · Score: 4, Insightful


    Would you consider yourself a determined believer that extra-terrestrials exist? If (for the sake of discussion) you were to determine that we were, without a doubt the only life in the Universe, how would that impact any religious beliefs you may hold?

    I personally believe that if we were to be the only life in the Universe that this would be divine intervention simply because of the statistics, would you agree?

    1. Re:Divine Intervention by Anonymous Coward · · Score: 0

      Off Topic?? How the hell is this off topic? It has to do with finding Extra-terrestrial life and and the religious consequences of it.

      If I had any mod points, I'd mod this up...

    2. Re:Divine Intervention by sigep_ohio · · Score: 1

      I don't think that is a question that will ever truely be answered unless one of two things happens. 1) god appears to everyone on earth and says that we are the only ones in the universe or 2) an alien species makes contact with the entire planet.

      But, if I had to actually answer I would say for me it wouldn't change my beliefs unless example 1) above occured. Of course everyone reacts differently, so I suppose it would change some peoples outlook on the world.

      For me the question has always been, why do humans need God to feel important or wanted as a group? and for that matter, why do humans need religion to form a moral belief system? But thats getting way off topic.

      --
      Beer Die is the game of champions Learning To walk my own path.
    3. Re:Divine Intervention by CaffeineAddict2001 · · Score: 3, Insightful

      No, it just tells us the old way of calculating the probability of life is wrong.

      It's very unlikely that today I will run into 13 eskimo amputee clowns at McDonalds.

      But suppose I do, which is more likely:
      1) This is the work of god.
      or
      2) Eskimo amputee clowns arn't as rare as I had previously thought.

    4. Re:Divine Intervention by Tenebrious1 · · Score: 1

      I personally believe that if we were to be the only life in the Universe that this would be divine intervention simply because of the statistics, would you agree?

      And Drakaea elastica must also be a work of God, because, statistically, it's unlikely that a flower would grow to be shaped and scented so similar to a female wasp that males attempt to mate witht he flower.

      --
      -- If god wanted me to have a sig, he'd have given me a sense of humor.
    5. Re:Divine Intervention by ggwood · · Score: 1

      Yes, yes I would have to agree that if we were the only life in the Universe, that would make God as likely as the non-existance of life elsewhere is unlikely.

      Let me rephrase: if life existing elsewhere were 99.9% likely, but it didn't happen, then I would say there was a 99.9% chance that it was, indeed, a divine plan. No matter what the numbers, there would always be uncertainty.

      Now for the big however.

      However, how the heck could we (a) prove that no life exists anywhere in the Universe? It is a rather large place. Then (b) we would have to compute the odds of Universes having life.

      Look, this is speculation at best. Let us just consider if life does evolve by luck. The only real way would be to *know* is to look at other Universes and count how many have life and how many do not. Maybe life on Earth-like planets can evolve with a very, very small probability. Let's say this odd is very slim, I don't know something like 1 is 10^100 or something like that. Fine. Let's say there are only 10^10 Earth-like planets in every Universe, thus the odds of a Universe having life is only 1 in 10^90, and life evolving twice in one Universe would be an astounding 1 in 10^180. This is rediculasly slim. However, the people on those worlds where they were the only life would think: "Holy cow this is unlikely! It must be God!" - but they didn't see the other 10^90-1 Universes which have no life, thus they don't know that is just was luck. And if they did see the other 10^90-1 empty Universes, what would they think?

      Lastly, you should be aware there is some evidence that amino acids have been found in inter-steller material which has fallen to Earth. There is also some evidence that an electric current passed through basic non-organic material can generate amino acids, too. Thus the materials for life are quite prevalent. If we consider a virus life, this is quite close to good evidence that viruses should be found almost anywhere.

      --
      a war on terrorism? How can we end a war on a method?
    6. Re:Divine Intervention by Anonymous Coward · · Score: 0

      I'm a firm believer in evolution, and you probably are as well. But I have to admit, that is an unusual and wonderful strategy. You sure don't see any plants trying to trick humans into attempting procreation with them.

    7. Re:Divine Intervention by Anonymous Coward · · Score: 0

      There cannot be more than one universe, or anything outside the universe, by the very definition of the word. Of course there could be things that exist which we will never be able to detect or measure any properties of.

    8. Re:Divine Intervention by Anonymous Coward · · Score: 0

      ObDouglasAdams

      3) There is an Eskimo amputee clown convention in town this week.

    9. Re:Divine Intervention by new+death+barbie · · Score: 1

      3) Someone's running around cutting the limbs off of eskimo clowns

      --

      It's supposed to be completely automatic, but actually you have to press this button.

  20. Cool article, cool web page by Omega1045 · · Score: 5, Interesting

    While I am a huge SETI fan, I immediately noticed the menu system at the top of the Astrobiology Magazine website. It gives the user of the site the ability to email the story, fax it, download it in Word, Acrobat or PalmDoc, or make it printer friendly. Among other options, it also will translate to Spanish, and read the article to you in MP3.

    A lot of work, I think kudos should be given to the web dev team that put this site together. Very cool site!

    --

    Great ideas often receive violent opposition from mediocre minds. - Albert Einstein

  21. What else would you suggest? by robinw · · Score: 5, Insightful

    Actually, there are more assumptions made than that. They are assuming that the lifeforms have developed radio technology as a form of communication, which could also be seen as an evolution of the ears/mouth that we have.

    Really, though, what it comes down to is this - the universe is REALLY, REALLY, REALLY big. And the amount of time they have to scan it is REALLY, REALLY, REALLY small. So what they're doing is deciding which planets to scan first. Since we have no idea what other platforms that life could have evolved on, the safest bet is to use that short amount of time is to scan those which are similar to our own. The idea being that we DO know what kind of variables were able to sustain life here.

    In the future, I think you'll see they'll expand their searching, as technology improves and our understanding increases.

    1. Re:What else would you suggest? by electrokal · · Score: 1

      Radio waves do not necessarily suggest that vocal or audio information is the modulating waveform. In fact I believe the radio waves sent out in to space from earth (on purpose) are prime numbers and pictures, but what do I know, I get my info from the movies.

    2. Re:What else would you suggest? by Anonymous Coward · · Score: 0

      Yeah, and the radio waves sent out accidentally mostly originate from Michael Bolton or Annie Lennox.

  22. MOD THIS UP by Anonymous Coward · · Score: 0

    WTF is wrong with you people. This is the only intelligent question posted!

  23. ATA search capabilities by Pop+n'+Fresh · · Score: 4, Funny

    "Today's interview with Jill Tarter of the SETI Institute (and Carl Sagan's inspiration for the main character of his novel Contact), outlines the forthcoming search capabilities of the large Allen Telescope Array.

    It's going to take them forever using ATA, wouldn't SCSI be able to handle many more simultaneous searches?

    --
    *This page intentionally left pointless*
  24. Why is this modded down? This should be +5 by FallLine · · Score: 1

    Mod this up. You may not agree, but it IS an intelligent question to ask here.

  25. F u C K Y o U cracker! by Anonymous Coward · · Score: 0

    There's no place for any hint of faith here, in the Rodina! God does not exist, GET OVER IT! It's been scientificially proven!!!!!!!#$@$@$

  26. Turn off that light! by paiute · · Score: 4, Informative

    After the events of the last few months, I am not so sure I want to be visited by an alien civilization - which is sure to have radically different notions of what behavior is justifiable - and that is sure to have unimaginable military superiority - and upon whom we can make no demands but have to accept their definition and conditions of our relationship.

    --
    If Slashdot were chemistry it would look like this:Cadaverine
    1. Re:Turn off that light! by Eloquence · · Score: 2, Insightful
      The silliest idea of them all is that alien civilizations would be a threat to us. Why? Because it assumes that technology advances only in peripheral areas, but not in the one that is most essential: thinking. True, our brains haven't changed much in the last few thousand years, but then again, our modern industrial civilization is barely two centuries old, our understanding of the human brain and our little spacefaring ability is much younger still. Now think about the technological demands for interstellar travel -- it is hard to conceive that a civilization capable of sending a substantial number of its people to another planet (which needs to be located first!) would not also have made some advances in its own thinking.

      And I'm not only talking about the software: Philosophy, culture etc. - which are also significant; as our history demonstrates, culturally underdeveloped civilizations tend to lose interest in space travel. We're already making small steps in interfacing chips with wetware. Any civilization that is sufficiently advanced for interstellar travel also has the technology to enhance its own thinking abilities beyond our current understanding.

      What, then, would be the motivation for such a spacefaring civilization to attack another? Resources? Hardly. The energy requirements to get those resources are much higher than the value of the resources themselves, and if these energy requirements can be overcome, you are no longer dealing with a resource-dependent civilization anyway -- you have nanotechnology, molecular assemblers etc. Blind hatred? A product of our primitive reptile brains, in spite of what Star Trek may have taught you (Klingons! Painsticks!), it is very unlikely that a civilization on that level would still be guided by such emotions, which could be turned off on demand using the same neuro-interfacing technology that also enhances rational thinking. Threat eliminiation? Earth a threat? Only to ourselves. The Day the Earth Stood Still was nice, but nuclear technology isn't exactly going to turn us into an intergalactic pariah as the movie predicted.

      No, the one motivation that will guide such civilizations is simple: information. They will want to learn about other worlds, other cultures, other planets. But they will not want to interfere with these cultures, for two reasons:

      • Giving a primitive, aggressive civilization access to highly advanced technology is, in fact, dangerous
      • You don't want to mess with your data. First alien contact has such a massive effect on any culture that it would ruin any observations to be carried out.

      So, if interstellar travel is possible and desirable (let's not even talk about all the relativity issues involved), aliens would most likely only watch. If it isn't, they would listen using huge (solar system sized?) radio telescopes. But they certainly wouldn't start "punishment" missions in order to eliminate "inferior" civilizations -- these are primitive motivations that are not rationally justifiable.

    2. Re:Turn off that light! by jafuser · · Score: 1
      Don't worry, our robot overlords will make short work of them once The Second Renaissance has passed...

      ... while we remain blissfully unaware ...

      --
      Please consider making an automatic monthly recurring donation to the EFF
    3. Re:Turn off that light! by sigep_ohio · · Score: 1

      Well thought out, and I agree with many of the things you say.

      But I have one problem, in all the time it took for this super advanced species to get where it is, how did it not send off any signals about itself. See, even if we as humans ever get to that point, we can't take back all those years of sending transmissions into space. So how would another species do it? This of course ignores the often forgotten fact that in order to send signals long distances, even in space, lots of energy is needed. lots of energy.

      Also, how can we assume that all cultures would be as aggressive as ours. I understand that most of our technological advancement is a result of our wars against ourselves, but whose to say it has to be that way. Primitive should not necesarily mean warlike or aggressive. Technological evolution may go slower in a non-aggressive society, but it should still progress. Therefore, giving access to more advanced technology to a peaceful, primitive society may not be as detrimental(ignore cultural aspects of such an occurance).

      --
      Beer Die is the game of champions Learning To walk my own path.
    4. Re:Turn off that light! by Eloquence · · Score: 1
      No signals? We haven't really looked. When it was government run, SETI had a budget of $12 million - which was eliminated in 1993, a year after its start, by the US Congress. "Waste of taxpayer money." (This PDF is a good overview of the funding history.) We're talking about millions of dollars, while hundreds of billions are funneled to defense corporations every year. Now SETI relies entirely on private funding such as the donations by Paul Allen. The ATA search starting 2005 is the first serious attempt, and it's still in the million dollar range. Until ATA, we have to rely on a couple of weeks telescope time in Arecibo every year.

      High-end SETI and planet searching will probably require very large, orbital telescopes in the billion dollar range. At that level, you can start receiving unintended signals (TV broadcasts etc.) from light years away.

      But perhaps the biggest problem SETI faces are universal timescales. Human civilization in detectable form has existed for barely 100 out of 4.6 billion years. We really have no clue what happens to most civilizations on the other side of that timescale:

      • A civilization can destroy itself. Hopefully, we are already past this stage.
      • A civilization might be destroyed by some cosmic event that cannot be technologically prevented and occurs regularly (e.g. supernovae).
      • A civilization might enter a state of artificially maintained cultural stagnation and isolation (Dark Age)
      • A civilization might decide to become totally undetectable, and do nothing but receive information.
      • A civilization might cease to exist in a physical form that is relevant to us ("transcension").

      Sure, this may sound silly, but we really have no knowledge about the development of civilizations. The civilizations that are actually broadcasting signals right now (or rather, some years ago -- damn relativity) may be far away and few. So let's start looking.

    5. Re:Turn off that light! by Saeger · · Score: 1
      Ray Kurzweil (search down page for "Why SETI Will Fail") has a similar take on this subject.

      Unfortunately, I don't think the odds are that great for us, or other civilizations, being able to cope with increasingly destructive tech while still stuck with violent reptile-brains (especially if nanotech develops much earlier Intelligence Enhancement & AI). IMHO, the odds are 1 in 1,000 that we survive another 30 years. The odds'd be much better if us morons would seed an offworld, self-sustainable colony.

      --

      --
      Power to the Peaceful
  27. Why do it? by PineHall · · Score: 4, Interesting

    I find the fascination with Extra-Terrestrials quite interesting. Is there some need for us to seek for someone outside of ourselves? Has the search for God been replaced by the search for ET? Are we looking for a God replacement?

    The reason I bring this up is that there is a very remote chance that an ET signal will ever be found and an even more remote chance that we will be able to communicate with them (impossible in the foreseeable future). So why spend money when the odds are so very low? What is this fascination?

    1. Re:Why do it? by .@. · · Score: 1
      there is a very remote chance that an ET signal will ever be found


      Why? That's a claim that deserves a bit of support, rather than being tossed out like that, cold, naked, and alone.
      --
      .@.
    2. Re:Why do it? by sigep_ohio · · Score: 3, Interesting

      why do billions of people around the world believe in God? and give lots of money to their churchs/mosques/sinagogs(sp?)? belief in something greater than themselves. it is a need that lots of people seem to have. no one wants to think that we are alone. so if not god, then ET is who you look for.

      it all boils down to thinking that humans are special, and why are we special. if you are in the God camp, then most likely you think humans are unique in all the universe. the ET camp says we are not unique, but that we have brothers in space on distant worlds.

      as for the remote chance, well it is a remote chance that you will win the lottery, but people still play. a remote chance that you will get SARS, but people are still up in a panic. for many the odds don't matter, it is the possibilities that do.

      --
      Beer Die is the game of champions Learning To walk my own path.
    3. Re:Why do it? by mysticgoat · · Score: 5, Interesting

      I find the fascination with Extra-Terrestrials quite interesting. Is there some need for us to seek for someone outside of ourselves? Has the search for God been replaced by the search for ET? Are we looking for a God replacement?

      I can only answer for myself, of course:

      1. Not a need in my case, but a desire that is stronger than the urge to purchase lottery tickets. See below.
      2. No, I continue to seek the gods as well as having an interest in seeking ET sentience. Obtaining a positive answer for one would probably have an impact on how I do the other, but at this point I do not see them as related endeavors. Certainly not as mutually exclusive pursuits.
      3. No, I wouldn't regard any other form of carbon/water based life as being a god substitute. Nor do I regard SETI's activities to be some kind of replacement for spiritual explorations.

      The reason I bring this up is that there is a very remote chance that an ET signal will ever be found and an even more remote chance that we will be able to communicate with them (impossible in the foreseeable future). So why spend money when the odds are so very low? What is this fascination?

      Agreed: the chances of SETI's success are very small. And the chance of finding that signal would be even more remote if nobody looks for it.

      As you suggest, the meat of the issue is a budgetary problem. If SETI is successful, reception of that first message would have as much impact on science, art, and religion as the Copernican revolution. It would be like winning the lottery, but bigger. So how cheap does the lottery ticket need to be before it makes sense to buy one every month? I think SETI is cheap enough to budget for.

      But SETI is unlike the lottery in one important way: if signals are not found in a reasonable length of time, that will tell me something useful. For instance, if the NASA Manned Mars Mission Proposal includes US$1 billion to develop a death ray to deal with inimical aliens, I would use SETI's negative findings to argue against such a pork barrel.

    4. Re:Why do it? by Rxke · · Score: 1

      Fascination for potential knowledge, I guess. even if we would ever make 'contact,' chances are quite astronomical (yea,...) that we won't be able to interpret the 'message,' but only the fact that there is something out there would be of enourmous importance, it would, at least be a basis for new theories about the emergence of (intelligent) life. I do not agree this is a God replacement, God is supposed to have created the universe (in most religions, i think...) while E.T.'s are merely creatures of that God. even the theologist could have a whole new avenue of thinking: are thes creatures made in the image of god, have they seen a 'Jesus'... et.c. Yeah, the odds are very low, but the potential gain is ver high, it is like playing lottery for scientists, i guess.

    5. Re:Why do it? by jafuser · · Score: 1

      One benefit I see of discovering other intellignce in the universe is perhaps it will improve our solidarity as a species.

      It seems to be human nature to group ourselves as "us" versus "them". I think if "we" see "them" as another group separate from ourselves, then perhaps "we" (as a species) will get along a little better with each other than we are now.

      --
      Please consider making an automatic monthly recurring donation to the EFF
    6. Re:Why do it? by sigep_ohio · · Score: 1

      but maybe it will also divide us even further. Governments could clamour for weapons in order to "protect" its citizens. Fights among religions could break out as people try to deal with the ramifications of thousands of years of beliefs that were not wholly true.
      While I would like to believe that it would bring us together as a planet. I think on a basic level humans are both social creatures and selfish. We barely seem to be able to strike what little social balances that we have.

      Somehow I think something as monemental as a signal from ET, would have equal power to break us apart as it does bring us together.

      --
      Beer Die is the game of champions Learning To walk my own path.
    7. Re:Why do it? by certsoft · · Score: 1
      Are we looking for a God replacement?

      Can you really replace something that doesn't exist, at least not outside the realm of human imagination?

    8. Re:Why do it? by use_compress · · Score: 1

      KARMA WHORE!

  28. What about STI? by Scot+Seese · · Score: 2, Funny

    We need a department of the Search for Terrestrial Intelligence. ;(

    --
    THIS SPACE INTENTIONALLY LEFT BLANK.
    1. Re:What about STI? by TeknoHog · · Score: 1

      If you're searching for intelligence, Slashdot is not the best place to start..

      --
      Escher was the first MC and Giger invented the HR department.
  29. But the real question is by realdpk · · Score: 1

    How many LoCs of data does the 8 football fields of dishes generate, and what's the BogoMIPS rating on their obligatory Beowulf cluster?

  30. 350 Radio Dishes outside San Francisco by Azahar · · Score: 2, Funny

    Has this array identified San Francisco as a potentially habitable host?

    If it has then we are in trouble.

    --
    Cuiusvis hominis est errare; nullius nisi insipientis in errore perseverare.
    1. Re:350 Radio Dishes outside San Francisco by jqpublic · · Score: 1

      Actually, the ATA will be nowhere near San Franscisco. It will be located at Hat Creek Radio Observatory (http://bima.astro.umd.edu), about
      4.5 hr north of SF. The closest city of any size is Redding, CA.

  31. Vegans by SecretAsianMan · · Score: 3, Funny

    ...at least we don't have to worry about them wanting to eat us!

    --

    Washington, DC: It's like Hollywood for ugly people.

  32. Female geeks... by Anonymous Coward · · Score: 0

    Looks like female geeks are just an unattractive as male geeks. Makes me simultaneously proud and disappointed at the same time.

  33. Outside of San Francisco? by Bruce+Perens · · Score: 2, Informative
    I've been to Hat Creek. It's next to Mt. Lassen. I suppose that San Francisco is the largest city near it, but it's 3-5 hours from there.

    Bruce

  34. man: the talking animal by peter303 · · Score: 1

    As Harvard professor Steven Pinker says in his best-seller "The Language Instinct"- humans are compulsive communicators. So when we have the ability to communicate with E.T.'s (or dolphins) we will try to do so.

  35. Just shot-in-the-dark assumptions by Anonymous Coward · · Score: 0
    carbon is the only good choice for rich biochemistry.

    This is based on the analysis of one single biosphere. Again, generalizations based on a sample set of one.

    "For carbon life to develop, liquid water appears necessary.

    What of water vapor? Consider this, and your wild guesses could at least include those Jovian planets. You have to get past such provincial thinking.

    So, you have narrowed the search volume considerably by only considering stars that would likely have a planet in the "liquid water" sweet spot

    And you have excluded planets that are really no less likely to have "life" than the ones you are keeping in your list.

    Further, a planet must exist long enough for evolution to occur.

    This is an even wilder assumption (unwarranted generalization). To attempt to apply the number of years that something took place on Earth to other planets and other systems we know nothing about.

    ...that at least provides a starting point on where to look.

    If you are looking for intelligent life out there, throwing a dart at a star chart while blindfolded makes as much sense.

    What you are doing might make sense if you are looking for the Trekkie "class M" planet with the afro alien chicks with go-go boots. However, shouldn't the goal be too look for life, rather than just a much more limited and unlikely type of life?

    1. Re:Just shot-in-the-dark assumptions by Fastolfe · · Score: 2

      carbon is the only good choice for rich biochemistry.

      This is based on the analysis of one single biosphere. Again, generalizations based on a sample set of one.


      Chemical interactions are understood fairly well. Carbon is the only element that is capable of a hugely diverse set of molecules, owing to its relatively small mass and its ability to bond with a large number of other elements. This complexity makes it uniquely suitable for complex chemical reactions, which are needed to develop life.

      Other primary elements (like Silicon) achieve a similar degree of freedom in their bondings, but their mass is greater and bonds proportionally weaker, making them less flexible in the long run.

      Lots of study has gone into what other forms life might be able to take. Lots of imagination and toying with elements in a variety of environments, and we haven't come up with anything as flexible as carbon-based life.

      What of water vapor? Consider this, and your wild guesses could at least include those Jovian planets. You have to get past such provincial thinking.

      Without a surface of liquid water, it's very difficult to get even single-celled life to catch hold. If all of your water is in the form of vapor in the atmosphere, in what medium do you plan on getting different chemicals and acids together in just the right way? In order for your rudimentary forms of life to progress, they have to be able to propel themselves through the air in order to "feed" off of other chemicals and raw material. You really need a fairly viscous medium for organisms to push themselves against in order to move around, and to carry nutrients. It's unlikely that this viscous medium will be anything other than water if water is present in any form.

      So no, water vapor is not likely to do the job as well. But I suppose it's possible. I don't exactly have a xenobiology degree either.

      Further, a planet must exist long enough for evolution to occur.

      This is an even wilder assumption (unwarranted generalization).


      I disagree, but I suspect that's because I disagree with your other points. If I bought into the suggestion that forms of life are equally likely to take other, non-carbon, non-liquid-water-originating forms, this assumption might not necessarily be accurate.

      But still, how long do you think is "long enough"? Do you think a spacefaring species can evolve in 100 years? 1000? 100,000? 100 million? As the article says, it took about 800 million years for us to evolve, but single-celled organisms still needed a few billion years to come about first. Granted, this is a single data point, as you note, but can you suggest a better one, based on the data we have?

      If you are looking for intelligent life out there, throwing a dart at a star chart while blindfolded makes as much sense.

      I completely disagree here. You are deliberately ignoring the one data point we do have. What the researchers here are doing is saying, "OK, we probably have a whole spectrum of environments and situations where life can evolve. Let's eliminate the conditions that make it completely unlikely that any form of life can take hold and put the rest on a probability function with our situation at its peak."

      Absolutely this is making an assumption that life will evolve elsewhere that is similar to life on earth. But what you fail to acknowledge is that there is no evidence to suggest life can evolve in any other way. In fact, we've been collecting a lot of evidence lately that suggests many other "alternative" families of chemicals do not give rise to conditions that may make life possible. That's why those conditions are excluded. We aren't being closed-minded, we're filtering the data set based on the data we do have.

      shouldn't the goal be too look for life, rather than just a much more limited and unlikely type of life?

      Your argument seems to come back to this th

    2. Re:Just shot-in-the-dark assumptions by Glock27 · · Score: 2, Insightful
      carbon is the only good choice for rich biochemistry.

      This is based on the analysis of one single biosphere. Again, generalizations based on a sample set of one.

      No, it is based on the analysis of every chemical in the universe, most likely. This is confirmed by astrospectroscopy.

      The possible chemical interactions of these elements are well understood. Only carbon permits sufficiently complex molecules, with other important attributes like flexibility. Silicon, a closely related element, is the nearest in suitability, but it is much more limited.

      And you have excluded planets that are really no less likely to have "life" than the ones you are keeping in your list.

      I disagree.

      This is an even wilder assumption (unwarranted generalization). To attempt to apply the number of years that something took place on Earth to other planets and other systems we know nothing about.

      The Earth existed for around 1.5-2 billion years before it was remotely suitable for life. These are mostly straightforward physical processes such as cooling and atmosphere formation.

      Many of the brighter stars you can see in the night sky have total lifespans before extinction of less than one billion years. Others are so variable as to produce very unsuitable conditions for carbon based lifeforms. Others are in multiple star systems where stable planetary orbits are impossible.

      These are largely the types of systems that have been eliminated from the initial search (emphasis mine).

      The best candidate stars will be from the F, G, K, and M classes of stars. See the Hertzsprung-Russel Chart

      If you are looking for intelligent life out there, throwing a dart at a star chart while blindfolded makes as much sense.

      Nope. See above.

      What you are doing might make sense if you are looking for the Trekkie "class M" planet with the afro alien chicks with go-go boots.

      It'll be very interesting how close alien "DNA" is to terrestrial DNA. It is quite a stretch to think that carbon-based, intelligent aliens would even be bipedal, much less humanoid. I'd suggest that the variety of life on Earth argues otherwise, and that the octopus is arguably the second best design for intelligent life on this planet (other than the Great Apes).

      Think how different life on Earth might be if the some of the early extinction events hadn't occurred here. For instance, the Permo-Triassic Extinction. A brief quote:

      "Over a span of 5-10 million years, it is estimated that between 75 and 90 percent of all preexisting species were lost, including 80-96% of all marine species and approximately 57% of all marine families."

      However, shouldn't the goal be too look for life, rather than just a much more limited and unlikely type of life?

      All the evidence suggests that other types of life are likely to be "more limited and unlikely". That is exactly the point.

      --
      Galileo: "The Earth revolves around the Sun!"
      Score: -1 100% Flamebait
  36. OMG!! by tlambert · · Score: 1

    OMG!!

    The parent of this post was so funny that I had to go to the fridge, get a full glass of milk, and spit it up through my nose!

    -- Terry

  37. The PhD's don't know by Anonymous Coward · · Score: 0

    "No offense to you personally, but I trust the biologists and astrophysicists with PhD's a little more about what types of life might be out there than most Slashdot couch scientists.

    Little more? It is a difference between knowning diddly-squat and double-diddly-iddly-squat. Which is nothing.

    1. Re:The PhD's don't know by Fastolfe · · Score: 1

      I'd still trust their educated guesses over statements of fact by an AC on Slashdot any day.

  38. Football Fields? by Snover · · Score: 2, Funny
    the array spans an equivalent 8 football fields.
    C'mon, now, you think us geeks have ever actually been on a football field to know how large it is? We need this measured in something useful -- like, libraries of congress.
    --

    [insert witty comment here]
  39. VW's by plnrtrvlr · · Score: 1

    We need it in Volkswagons.... everything astronomical that is less than moon sized is measured in Volkswagons

  40. Re:SETI got it. by Anonymous Coward · · Score: 0

    It was determined that the odds of SETI succeeding were much better, and so the funds were diverted.

  41. HAN TOLD A JOKE!!! For f--ks sake by Anonymous Coward · · Score: 0

    George Lucas is not renowned for his intelligent dialogue. Han Solo was merely trying to be funny, as in "I can run the Cooper test in 12 minutes!".

  42. Re:no... by CrazyDuke · · Score: 1

    An anti-US (government) comment would be, "They could land, of course, if they made the right "campain donations" first.

    --
    Any sufficiently advanced influence is indistinguishable from control.
  43. the scientific article by azspacegirl · · Score: 1

    If anyone would like to see the actual article (published in Astrophysical Journal), the preprint pdf file is available at

    http://arxiv.org/PS_cache/astro-ph/pdf/0210/0210 67 5.pdf

    The article describes how the authors selected binary and triple star systems, stars with known planets, stars in the galactic disk/halo, stars with high metallicity, etc, etc. For the actual (nicer looking) reprint, though, you need a subscription to the journal or access to a library with a subscription.

  44. Re:the scientific article--URL by azspacegirl · · Score: 1

    There should be *no spaces* in that address--slashdot is posting it strangely.