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SETI@Home Revisits Its 100 Best Signals

cmbrothe writes "The Planetary Society is running an article about SETI@Home's plan to revisit its 100 most promising signal candidates. The article also outlines the criteria for selecting the candidates."

27 of 327 comments (clear)

  1. the criteria... by jaredcoleman · · Score: 5, Funny


    the signal must sound like a humpback whale...

    1. Re:the criteria... by platypus · · Score: 4, Funny
      I have a friend at SETI, and he sent me the code for the best signal. They are waiting for computing time at the Lawrence Livermore National Laboratory to further analyze it:
      nyy lbh onfrf ner orybat gb hf


      fhpxref
  2. The problem with doing it this way by Transient0 · · Score: 5, Funny

    Is that the REAL signals will obviously be coming from starships in nearby space which have either warp/hyperdrive and will therefore be NOWHERE near where they were when the signal was first detectred months or years ago.

  3. formula for likelihood of life by guidobot · · Score: 5, Insightful
    The formula used to rank the different stars according to the likelihood that they would host a communicating civilization is:

    score= N*(bv-bv0)*exp(0.5*(bv-bv_sun)^2)/(par+0.01)^3

    where

    N is a normalizing factor, 1.65x10^7
    bv is b-v color
    bv0 is b-v color of the bluest star in the catalog (-0.41)
    bv_sun is the b-v color of the sun (+0.65)
    par is the parallax in milliarcseconds

    How exactly do you test the validity of a formula like this?

    1. Re:formula for likelihood of life by ari_j · · Score: 5, Funny

      Empirically. You find places that it says there is life. Then, you go and check for life. The correlation ratio between the two sets of results should give a very good indication of the validity of said formula.

  4. Playing the Odds by Nintendork · · Score: 4, Interesting
    I'm telling myself that it's not going to happen, but what if more than one of those 100 candidates turns out to be the real thing. What a shocker that would be!

    I mean, with the amount of planets out there, I'm sure there's a whole lot of life and a lot of intelligent life. It's just that we hope to find one other intelligent race and people aren't even thinking about finding more than that.

    -Lucas

  5. Re:Suppose we get a signal... by Shimbo · · Score: 4, Funny

    "Ah, a signal. Quick, beam a signal back, and...uh...wait 30,000,000 years for a reply! Cool!"

    sounds like your typical tech. support query.

  6. Wait a minute.... by John+Harrison · · Score: 4, Funny

    Wasn't that telescope destroyed in Goldeneye? How are they still using it?

  7. The "Wow" Signal by szquirrel · · Score: 5, Informative

    Just for fun, I googled the 1977 "Wow" signal mentioned in the article and every so often in SETI news. Found this good BBC article on the subject.

    This blatant karma whoring is brought to you by the letters "ET".

    --
    Never approach a vast undertaking with a half-vast plan.
    1. Re:The "Wow" Signal by spakka · · Score: 5, Funny

      They need to devise a better naming scheme for these events, or else we'll end up with

      1. The 'Hey, Bob, look at this!' signal
      2. The 'Jesus Christ!' signal
      3. The 'Fuck me!' signal
      ...
      (97 others)

  8. Obligatory comments here.... by CSG_SurferDude · · Score: 5, Funny

    Obligatory comments here...

    • From the religious right, about how there are no aliens, and if there are, they are the work of Satan.
    • From the ignorant masses, about how this is a waste of money that could be better spent on (Insert pet project here).
    • From the biologists, about CPU cycles that could have been spent finding a cure for cancer.
    • From the Optical SETI folks, about what a waste of time RADIO SETI is.
    • From the /. crew about "Isn't this a dupe?"

    Did I miss any?

    1. Re:Obligatory comments here.... by stratjakt · · Score: 5, Funny

      Yes, you missed a few:
      - beowulf clusters
      - something about hot grits
      - something about natalie portman.
      - something about all your base belonging to us
      - links to goatse.cx
      - business plans that end in Profit!
      - offtopic rants about the DMCA/RIAA
      - informative posts about how this works in soviet russia

      --
      I don't need no instructions to know how to rock!!!!
    2. Re:Obligatory comments here.... by Plutor · · Score: 4, Funny

      Don't forget unfunny karma whoring "obligatory comments" lists!

    3. Re:Obligatory comments here.... by quintessent · · Score: 5, Funny

      offtopic rants about the DMCA/RIAA

      Well, I'm sure they are looking at this list harder than anyone. What if the aliens are broadcasting music without a license?

  9. Would they detect themselves? by wowbagger · · Score: 5, Interesting
    While I am a contributor to SETI@home, I have to wonder about the following question:
    "Given the rules they place on a signal, would SETI@Home have detected the past attempts we've made to contact other stars?"


    Consider the past efforts at Arecibo to send a message to other stars. We focused on one star for a couple of hours, and sent a message. Perhaps we repeated it over the course of a few days.

    Now, let us suppose that a civilization with a similar technology to ours was located on a planet around Proxima Centauri, and let us suppose they did exactly as we did in our transmissions at Arecibo. Would that signal have been found by SETI@Home?

    Given how the SETI receivers might not have been looking in the right places at the right times to see more than one transmission, might that signal have been discarded because we did not see more than one instance of it?
  10. Window of contact by hpeg · · Score: 4, Insightful

    I can't believe that people are still looking for signs of extraterrestrial intelligence, hooing to make contact one day.

    Stanislaw Lem once described the window of contact as the tiny amount of time in a planet's life that an intelligent life form has to evolve far enough to create enough noise around their planet that will be picked up as non-static background noise, until its civilisation dies the entroy death.

    Even if we picked up something now, it would only be a tiny flicker of something that existed millions of years ago, with no hope of us ever meeting whoever created this glimpse of order in the chaos of the universe.

    We are alone out there. Confined by the same rules that hold our universe together into a tiny section of space and time. The best we can hope for is to become nomads, travelling to near systems in the hope of making them inhabitable when this sun gives out. If we haven't fallen into the ashes until then.

    1. Re:Window of contact by mmacdona86 · · Score: 5, Insightful

      As others have pointed out, we could pick up something that existed a few score or a few hundred years ago, and that would certainly be interesting.

      Even knowing there was intelligent life somewhere else millions of years ago--and if the signal was millions of years old, it would necessarily represent an extremely advanced civilization, powerful enough to transmit a signal to another galaxy--would be extremely interesting scientifically and philosophically.

      Finally, it is only conjecture that the "Window of Contact" is brief. For all we know, once civilizations get to a certain point of development, they last forever, and slowly but surely colonize all the inhabitable parts of their galaxy.

  11. Number One on the SETI "Top 100" Hit Parade: by DuckDuckBOOM! · · Score: 5, Funny

    A cover of "Peppermint Twist" recieved from a point near Epsilon Eridani, played on what sounds like oil drums and unlubricated condoms using a 68-tone scale. Great beat and you can dance to it if you have five legs.

    --
    Life is like surrealism: if you have to have it explained to you, you can't afford it.
  12. Are we broadcasting, too? by Seanasy · · Score: 4, Interesting

    I'm not talking about all the regular satellite communications. Are we intentionally broadcasting any messages for the universe at large?

    If, however, the barycentric frequency of a signal remains steady, this almost certainly means that it is designed to compensate for the movements of its own host planet. In other words, it would point to a deliberate intelligent design.

    And would regular satellite communications appear barycentric? It doesn't sound like it. So, if we're not broadcasting barycentric signals, why would we expect other lifeforms to broadcast them? Or are we braodcasting something barycentric? Can I tune in?

    1. Re:Are we broadcasting, too? by Idarubicin · · Score: 4, Interesting
      It's not that SETI@Home is ignoring non-barycentric signals; they are just assigning barycentric signals a higher priority for examination.

      This is a pretty reasonable approach, actually. Barycentric signals imply deliberate action. Further, they imply that the signals are intended to be received by someone or something (not necessarily us) beyond the immediate space about the transmitting planet.

      SETI@Home is certainly not ignoring non-barycentric signals, they are only prioritizing the (literally) billions of potential 'hits' they have accumulated. I'm quite sure that if we started seeing large gaussians every time Arecibo swung past Proxima Centauri, nobody would ignore them even if the peaks Dopplered a bit from planetary orbital motion.

      On the flip side, no--we are not broadcasting any barycentric signals right now. An alien SETI@Centauri project might assign us a slightly lower priority because we're not making a deliberate effort to be noticed. Nevertheless, continuous radio and television signals across multiple frequencies would probably make us quite an interesting target to any race with good enough detectors and large enough dishes.

      --
      ~Idarubicin
  13. Tycho2 vs. Hipparcos by KjetilK · · Score: 4, Informative
    I'm a bit surprised that they refer to the Hipparcos catalogue as the most comprehensive star catalogue, when the Tycho 2 catalogue is far bigger.

    Sure, the astrometry (positions) in Hipparcos are better than in Tycho 2, and Hipparcos contains more information about the stars than Tycho 2 (e.g. variability), but still. I would in fact think that Tycho 2 would be better for SETI than Hipparcos, but they may have their reasons.

    --
    Employee of Inrupt, Project Release Manager and Community Manager for Solid
  14. Re:Hi SETI people.... by Idarubicin · · Score: 5, Insightful
    Me? I'll spend my spare CPU cycles trying to find a drug combination to cure cancer.

    Very noble of you. Among other things, I have spent my own time, not my computer's, working on cures for cancer. (Right now I'm back at school.) I could have been earning much better money pushing paper--actually, I took a 25% pay cut to do cancer research.

    You know what? I was running SETI@Home on my computer at the time. And I don't feel guilty about it. Maybe there was a better use for those cycles, but I think of it as a sort of hobby for my computer. People who spend their spare time watching football, or playing with electric trains, or painting--forget what their computers are doing, shouldn't they be working on 'more relevant' problems?

    Breast cancer killed my best friend's mother this summer. I would love to see a cure for cancer, as well as for any number of other diseases--Alzheimer's runs in my family, and my uncle has diabetes. But if fear of death is to set all of our priorities, leaving no room for a sense of wonder and exploration--what's the point of living?

    If you really want to help people in a tangible way, please--go out and give blood. Not just after a terrorist attack, but every two months. Or volunteer at a food bank. Not just at Thanksgiving, or Christmas, but year round. Write a cheque to a charitable organization. If you can't afford that, write a letter to your government representative--tell them what their funding priorities should be.

    --
    ~Idarubicin
  15. More info on the top 100 by i8a4re · · Score: 5, Interesting

    There are two things I'd really like to take a look at, and I'm sure I'm not the only one.

    First, there is a program that can convert the work unit files into a wav file. I think it would be pretty cool to listen to some of these top 100 signals. I've played with the program on quite a few work units and never been able to hear anything but static. As strong as the top 100 signals are, you should actually be able to hear something.

    Second, there are a few places on seti's and related sites that show a picture of what a good signal looks like. Why don't they take a grad student and make him run through the top 100 signals and record what the graphics look like when it is processed?

    I've actually emailed them before and requested both of these. I've never gotten a response nor have they posted either. If they have, then I've just missed it.

    --

    If I drive fast enough at the red light, it'll appear green.
  16. WHOOOOHOOOOOO! by chersk · · Score: 4, Funny

    100 Best Singles!... Thats what i'm Talking about!.. 100 hot alien singles with hot alien bod's and hot.... uh... oh.... signals.... dang..

    never mind....

    --
    "just another ugly toad waiting for a kiss from a princess"
  17. Making it harder for considerate aliens? by sbaker · · Score: 4, Funny

    So we little green aliens go to all the trouble to put the
    transmitter far away from any other radio sources (like stars
    and galaxies) - we shift the frequency to compensate for the
    orbit of your planet around your sun - we listen to your
    transmissions and send ours back on channels we know you
    must be listening to - and we get modded down for all of
    those things? Damn!

    So what DO we have to do to get more Karma at Seti?

    --
    www.sjbaker.org
  18. K-Tel Compilation by GuyMannDude · · Score: 4, Funny

    Actually, I was thinking that SETI@Home should not only "revisit its 100 most promising signal candidates" but burn them onto a CD-ROM set and make a deal with the record company whose name is synonomous with compilations, K-Tel, to sell them. The perfect gift for the geek who has everything...

    GMD

  19. The first message will be something like... by Lobsang · · Score: 4, Funny

    Dear Sir/Madam/Globunsk/Srhamel/Goot:

    I'm the ruler of Andromeda-3, an M Class Planet in the constellation of Andromeda. My father, the fifth ruler in the Pfthoskkkrkfhhdfkfk dinasty has been robbed. If you could lend me your intergalactic bank account so I can transfer my funds to Alpha Centauri... :)