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SETI Finds Interesting Signal
Posted by
michael
on Wed Sep 01, 2004 07:22 PM
from the ding-dong-ditch dept.
from the ding-dong-ditch dept.
Several readers sent in notes about an interesting signal discovered by SETI. No real evidence of Someone Out There, but not fully explainable either. Another reader submits a blurb suggesting that aliens should send spacemail, not signals: "Rutgers electrical engineering professor, Christopher Rose, has an article on Nature magazine's cover today describing the most efficient way for our civilization to be discovered by aliens. On this question of better to 'write or radiate', his conclusions: better not to send radio transmission, when physical media like DNA on an asteroid can declare a terrestrial presence. Similar to what motivated Voyager scientists to attach a plaque for the outbound trip. Rose has some great information payload sizes as examples (like the entire information equivalent for our global genome fitting on a 100 pound laptop!)."
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Waste of time (Score:5, Funny)
Re:Waste of time (Score:5, Funny)
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Re:Waste of time (Score:5, Funny)
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Re:Waste of time (Score:5, Informative)
Since the Vulcans are too dumb to figure this stuff out and follow a philosophy we abandoned that hit its peak and quickly declined about two thousand years ago, I'd say that they are too dumb to have actually created warp technology on their own and they must have just stolen the technology from another civilization.
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Re:Waste of time (Score:5, Informative)
The original series specfically addressed Vulcan "logic" as more of an unemotional state. Their idea is to make a decision based on rational thinking, utilizing the facts at their disposal. The Vulcans/Surak felt they must follow such a course because their powerful emotions were destroying their society.
Furthermore, I'd wager that in cases where one doesn't have enough information to make a "logical" decision, it's usually much wiser to follow one's emotions.
Actually, that was sort of the point of Kirk and Spock's relationship. Spock tempered Kirk's impulses, while Kirk showed Spock that emotions can be a valuable asset when making decisions.
Since the Vulcans are too dumb to figure this stuff out and follow a philosophy we abandoned that hit its peak and quickly declined about two thousand years ago, I'd say that they are too dumb to have actually created warp technology on their own and they must have just stolen the technology from another civilization.
Have you been watching Enterprise? Those aren't Vulcans! They're dumbasses in robes and bowl cuts POSING as Vulcans! I'm willing to bet that they're really aliens created by future guy to slow down human development! The real Vulcans were shang-hied by future guy before they met Cochrane! Or maybe Enterprise just sucks. Hmm...
===/GEEK ALERT===
Putting the technobabble aside for a moment, the Vulcans were a plot device that Roddenbery used to explore the human condition. It's quite common in writing to take a human trait to an extreme or remove it so as to use the contrast to better explore the attribute. In the case of Star Trek, the "emotional" vs. "unemotional" contrast allowed the strengths and weaknesses of each approach to become obvious.
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Get a life, you people (Score:5, Funny)
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Re:Waste of time (Score:5, Funny)
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Re:Waste of time (Score:5, Funny)
Great while we're at it, let's also send them a Macintosh floppy disk. To make it fun, nobody tell them if its big or little endian. Anyone in the universe up for some GACTAGATTGAC?
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Re:Waste of time (Score:5, Funny)
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DNA Over Signal (Score:5, Funny)
Re:DNA Over Signal (Score:5, Interesting)
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Re:DNA Over Signal (Score:5, Funny)
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Re:DNA Over Signal (Score:5, Interesting)
They get completely overpowered by the huge great big solar radio emitter, so that by the time they reach another starsystem, all thats resolvable is the signal from our sun itself.
This actually turns out not to be the case, for a couple of reasons. First, Earth outshines the sun on several radio bands - the sun's dumping most of its energy as visible light, and while electrical effects in its atmosphere are noisy, they don't cover the entire radio spectrum. Second, we could launch solar-orbit radio telescope arrays _now_ that would have enough angular resolution to pick out individual thunderstorms on the superjovian planets we've detected nearby. Resolving a beacon from a star spatially, for any star system near enough to matter, is do-able (though we aren't going to do it ourselves until we decide a space-based radio telescope array is worth the money).
I also question the parent post's assertations that radio signals are degraded to unintelligability. We can pick up millisecond pulsars just fine, meaning we could at the very least broadcast a beacon with data modulated at kHz rates. My understanding is that there are relatively clean frequency windows in the interstellar medium that would let us transmit intelligeably at far higher bandwidth.
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Re:DNA Over Signal (Score:5, Insightful)
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Re:DNA Over Signal (Score:5, Funny)
Well, it's a feel-good PR thing and it probably cost next-to-nothing relative to the overall project and it maybe it helped get the project through appropriations.
"Look, here's our interplanetary probe, and oh, we've engraved our likeness on a plaque with a greeting in case anyone finds it! *wink*"
"Remarkable! What do you think aliens would do if they found it?"
"Oh, it's likely that an intelligent alien civilization will want to find the makers of this probe and pay us a visit to share their knowledge. Isn't that nice!?"
meanwhile, just outside the orbit of Neptune...
"Hey Glargh, look at this..."
"Oh, how cute -- another one of those 'hey, we are here please come visit' things. What should we do?"
"You know standing order #412,323.443!"
"Oh, right -- let's make it look like an accident. Hey, here's a nice, big asteroid in a goofy orbit between the 4th and 5th planet -- just a little nudge... there. Now, in about 100 orbital rotations or so, they'll get a visit they'll never forget!"
"Glargh, its moments like these when it all seems worthwhile."
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Re:DNA Over Signal (Score:5, Insightful)
The other problem with earth-based transmission is that we don't do it anymore [slashdot.org]. We'd need large antennas broadcasting "we're here" signals outwards, and considering SETI already has problems with credibility while looking for signals, I'd imagine getting funding to send out signals would be even harder.
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Re:DNA Over Signal (Score:5, Insightful)
So say you throw 100 rocks (each with a placard saying "Eat at Joes") out in an even distribution across the night sky then the density of those rocks in a shell centered on and growing out from the earth will reduce in accordance with the inverse square law. The farther you get from the earth the bigger this shell gets and the farther the distance between the rocks in the shell.
This increase in distance between the rocks means we have to get luckier and luckier that someone will actually see one or more of rocks and the little placard on it.
So your statement is non sensical since the inverse square can affect a bunch of rocks or photons.
Of course if we get lucky and someone happens to be inline with a rock they could get the message much better then a weak electromagnetic signal. Of course for every rock we send out we can send out trillions and trillions of photons in focused beams that can get their attention with enough signal strength to be useful. The beam can cover vastly larger areas then a rock ever could (now a rock with a say radio source could be interesting) and they travel just a wee bit faster
(I can see it now we launch a rock at a considerable fraction of light speed to get it out to a candidate world in a timely fashion only to get lucky and have a direct hit on their world... booom! Yeah they got the message alright.)
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Re:DNA Over Signal (Score:5, Informative)
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Re:DNA Over Signal (Score:5, Informative)
This isn't a true statement depending on what exactly you mean...
For one the range of the electromagnetic force is infinite (see this for more information [gsu.edu]).
Second the inverse square law comes from the fact that the area of the shell of radiation coming off of a point source (star for example) increases to the square of the radius from the source (basic geometry). Yet the amount of energy (number of photons in the case of electromagnetic radiation) that is in that shell of radiation is constant so the density of those photons reduces by the inverse of the square of the distance (See this for a graphical explination. [gsu.edu])
So if you look at a given photon traveling through space its "signal" will not weaken with the square of the distance, if it did this universe would be a dark dark place (also it would break the concept of quanta).
Also if you have photons traveling parallel to each other then the inverse square law doesn't apply because you have not radius to begin with.
Now it is hard to get fully parallel photons but you can get close (lasers, maser, etc.) and the closer you get the greater the radius of the theoretical point source for the signal. The greater the radius of the point source the father the signal can propagate before the exponential effects of the inverse square law begins to take hold.
So yes it is likely that the inverse square law applies to signals such as these but the point source radius to use in the calculation can be relatively huge if you take steps to focus the signal (attempt to have the photons travel in a parallel beam).
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Re:DNA Over Signal (Score:5, Insightful)
This is probably the key point. Yes, the energy density decreases with square of distance, but that just means you have to stare longer to see the signal. This is how telescopes can measure faint stars. If they look longer, more photons arrive. So if we sent a modulated signal (e.g., amplitude, frequency, phase) it would still reach other planets in a readible form. The modulation would just have to be very slow so they don't integrate the whole modulation over the "staring" period.
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Re:DNA Over Signal (Score:5, Informative)
The radiation radiates from a point (more or less). As the radiation travels it forms an expanding sphere. The energy from the initial burst of radiation is spread out over the surface area of this sphere.
As the surface area is proportional to the square of the radius, the energy dissipates at a rate of 1/r^2.
For the energy to dissipate at a rate of 1/r^3 it would need to be spread throughout the sphere, as the volumne is proportional to the cube of the radius.
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Re:DNA Over Signal (Score:5, Informative)
Lasers aren't actually parallel. They are diffraction limited. The smaller the collimation the more quickly they diverge. A big diameter laser can have a lower divergence, but then the energy density is also lower. And still, over the distances we're talking about it would still be a huge spot size.
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Every time... (Score:5, Interesting)
Re:Every time... (Score:5, Informative)
It is a common misunderstanding that the SETI project is decoding radio signals and trying to listen to some sort of alien language. What SETI is actually doing is looking for radio signals that are not from Earth. They are rather easy to find because as the Earth spins, it will create a very predictable increase and decrease in the frequency of radio waves that are not from Earth (simple doppler effect). Waves produced from the Earth have a near constant frequency because both the sender and receiver and spinning around the Earth at the same time.
An interesting signal is one that is from off-planet. It gets more interesting if the direction of origin is some other galaxy. It gets even more interesting if there is no scientific reason for any object in that galaxy to produce the signal. Finally, with all that checked, someone might try to see if the radio waves are transmitting an actual message - or we can beam our favorite Simpsons episodes right back to source to prove our own intelligence.
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Some things are universal, not cultural (Score:5, Insightful)
You do realize that in the SETI context "advanced civilization" means "technologically advanced civilization"? If they are an advanced civilization they will have a basic understanding of science, of how the universe works. Electromagnetism is an elementary part of that understanding. Our methods for establishing communication do not have a western or human bias. Counting off prime numbers is pretty neutral, an advanced civilization should recognize that this would be a quite improbable natural phenomena. Similarly the frequencies we would use for such signals would be pretty neutral, a multiple of a universal constant, another improbable natural phenomena. Some things are universal, not products of human or western culture.
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Re:Every time... (Score:5, Interesting)
Not necessarily. On a somewhat cooler world than ours with 4-5% flourine in the atmosphere, water would be immediately broken down into oxygen and hydroflouric acid, which is liquid in the -83 to 19.4 C range.
This works because "plants" could function by photosynthesis with HF in place of water and carbon tetraflouride in place of carbon dioxide to produce H-C-F chain compounds and liberate free flourine, with nickel as the catalyst in place of the magnesium in chlorophyll. We'd have to postulate higher UV energy levels as well to provide enough decomposition energy, but that goes along with a thinner atmosphere and lower temperatures without much of a stretch.
"Animal" soft tissues in this scenario would be about the same as the plants, but hard tissues would be produced by the reaction
{ H-C-F } + F2 -> { F-C-F } + HF
resulting in a teflon boned and shelled organism, probably one muther-tough sonofabitch. His main energy reaction would be
{ H-C-F } + F2 -> CF4 + HF
with a blood catalyst metal of titanium, which would result in colorless arterial blood and violet veinous, as the titanium flips back and forth between tri- and tetra-valent states. So he'd probably be a good deal more energetic than us 02-running organisms as well.
Given what we know about vulcanism on the outer moons and so forth, I wouldn't be surprised to find that a scenario along these lines is rather more probable around the universe than the local one we're familiar with.
Their technology would be rather different than ours too, since no terrestial style organic matter is possible, and there wouldn't be much around except flourides; no oxides, sulfides, silicates, or chlorides. All metallurgy would have to be electrical. Oh, and they probably wouldn't be good mountain climbers either, since flourides are structurally weak; nothing tough like granite to make mountains out of. So technological progress seems a trifle unlikely. But *shrug* they'd probably think that about Earth, too...
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A minor issue is that (Score:5, Insightful)
Finally! (Score:5, Funny)
When the signal was finally translated... (Score:5, Funny)
Don't worry, NASA scientists have already modded them down.
Mysterious signals from 1000 light years away (Score:5, Informative)
New Scientist [newscientist.com] is reporting that the signal "also happens to be the best candidate yet for a contact by intelligent aliens in the nearly six-year history of the SETI@home project, which uses programs running as screensavers on millions of personal computers worldwide to sift through signals picked up by the Arecibo telescope...*snip*
They should made the data available (Score:5, Interesting)
Alien Message... DECODED! (Score:5, Funny)
Let me start by introducing myself. I am Sub-Commander Qulon Zarg, credit officer of the Trans Galactic Bank Ltd. I have a concealed business suggestion for you. Before the Pulson/Darius war our client Overlord Argus Vader who was with the Gandor Star Force and also business man made a numbered fixed deposit for 18 calendar months, with a value of Twenty millions Five Hundred Thousand Zerglian Dollars only in my branch. Upon maturity several notice was sent to him, even during the war early this year. Again after the war another notification was sent and still no response came from him. We later find out that the General and his family had been killed during the war in bomb blast that destroyed their entire planet. After further investigation it was also discovered that Overlord Argus Vader did not declare any next of kin in his official papers including the paper work of his bank deposit. And he also confided in me the last time he was at my office that no one except me knew of his deposit in my bank.
So, Twenty millions Five Hundred Thousand Zerglian Dollars is still lying in my bank and no one will ever come forward to claim it. What bothers me most is that according to the to the laws of my country at the expiration 3 years the funds will revert to the ownership of the Episilon Prime Government if nobody applies to claim the funds. Against this backdrop, my suggestion to you is that I will like you as a foreigner to stand as the next of kin to Overlord Argus Vader so that you will be able to receive his funds.
WHAT IS TO BE DONE:
I want you to know that I have had everything planned out so that we shall come out successful. I have contacted an attorney that will prepare the necessary document that will back you up as the next of kin to Overlord Argus Vader, all that is required from you att his stage is for you to provide me with your Full Names and Address so that the attorney can commence his job. After you have been made the next of kin, the attorney will also fill in for claims on your behalf and secure the necessary approval and letter of probate in your favor for the move of the funds to an account that will be provided by you.There is no risk involved at all in the matter as weare going adopt a legalized method and the attorney will prepare all the necessary documents. Please endeavor to observe utmost discretion in all matters concerning this issue. Once the funds
have been transferred to your nominated bank account we shall share in the ratio of 70% for me, 25% for you and 5% for any expenses incurred during the course of this operation. Should you be interested please send me your private phone and fax numbers for easy communication and I will provide you with more details of this operation. Your earliest response to this letter will be appreciated.
Kind Regards,
Sub-Commander Qulon Zarg
Thanks guys.... (Score:5, Informative)
But it was you guys all along! [StrongBad tear]
Seriously. To your credit, I first found out about SETI@Home on Slashdot and ran it for years on spare computers.
Now I have made SHGb02+14a my beeyotch.
Then you guys Slashdotted the article before my mom could see it.
Re:Thanks guys.... (Score:5, Informative)
One of my computers found that signal. (magenbrot did too, but I dont know if he/she is aware of it yet)
I have the feeling it was my wife's computer, as it was doing the most crunching at the time of the original hit. (She uses it, I built it.)
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It definitely comes from earth (Score:5, Insightful)
Nobody seems to have noticed this paragraph of the Article: So, everytime they detected it it started at 1420 MHz and then started shifting? How could asignal from 1000 Lightyears away react in such a way? Do you think the aliens restart the signal every time we are looking?
No, sorry, everyone. This looks pretty much. like a malfunction of the telescope in Arecibo.
Re:And here comes another signal... (Score:5, Informative)
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Re:and we wonder where DNA technology is going. (Score:5, Insightful)
But it could also be WAY too fricken big for us to be detectable...
(try crunching some numbers WRT the invention of radio transmitters, the speed of light, and the distance to nearby stars)
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Re:and we wonder where DNA technology is going. (Score:5, Informative)
NeoThermic
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Re:send engineered DNA (Score:5, Funny)
Everybody knows that if you send some genetically engineered organism into the vastness of space, it will only return far more advanced - and destroy us for sending it's ancestors to a dark and empty prison.
Duh.
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Re:send engineered DNA (Score:5, Insightful)
Why would they even look at DNA, if they didn't realize it was a way to encode info as well as the foundation of life for us?
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Re:SETI finds a signal? (Score:5, Funny)
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Re:Time to go find the dog (Score:5, Informative)
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Re:Sending DNA doesn't seem like a good idea... (Score:5, Insightful)
I mean, it would be cool to discover intelligent aliens and all, but why have them discover us?
I like to surf the internet, but for crying out loud, I have a firewall. I see the Internet, the Internet doesn't see me.
I'd say just be cosmic lurkers until we are damn sure it is safe to be sticking our nose into things.
Of course the odds of anything on this topic happening (good or bad) are so poor that I don't think anyone has to worry.
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Re:One question (Score:5, Interesting)
Basically, I've heard it called the window and door problem - we have a window of 50-100 years (I forget whose estimate) when a civilization is accidentally radiating to find them, and then we have to wait for them to open the door by transmitting intentional beacons.
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Re:I for one... (Score:5, Funny)
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Coral Cache Ineffective (Score:5, Informative)
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Don't be scared (Score:5, Informative)
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Re:Coral Cache Ineffective (Score:5, Funny)
You foolish humans and your 'universal' time. We from Persei Omicron 8 will smash you for your arrogance!
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Re:Anyone got a torrent? (Score:5, Informative)
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Re:My God, it's full of primes! Seriously! (Score:5, Insightful)
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