Do you think aliens use radio waves to communicate with each other?

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Profile Julie
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Message 1797053 - Posted: 18 Jun 2016, 6:41:00 UTC - in response to Message 1796649.  

Actually, what I like about gamma rays is the information content in bits/second, which is astronomically higher for gamma rays than for radio.


+ 1
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Message 1799943 - Posted: 1 Jul 2016, 16:16:38 UTC

It would be better to use neutrinos or gravity waves for all sub-light communications, because they are not hindered much or at all by matter/energy.

I purpose that SETI crunch the LIGO data set to see if there are any super advanced civilizations that are using gravity waves for communications.

We also need to fund research to determine without a doubt that radio activity is NOT affected by neutrinos. There was a ruffling of scientific community when it was announced a few years back that solar neutrinos (from our sun) was slowing down the rate of decay. If there is any truth to this, then it will be easy to create a neutrino detector for a communication device, and it won't be as big as a football field.

Neutrinos would be a great energy medium for communications if we can just detect them a bit easier.

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Message 1799949 - Posted: 1 Jul 2016, 16:59:30 UTC - in response to Message 1799943.  

I purpose that SETI crunch the LIGO data

Since LIGO to date has only found black holes collisions it is obvious no communications could be found.
The LIGO Scientific Collaboration, The Virgo Collaboration
(Submitted on 30 Jun 2016)
We report results of a deep all-sky search for periodic gravitational waves from isolated neutron stars in data from the S6 LIGO science run. The search was possible thanks to the computing power provided by the volunteers of the Einstein@Home distributed computing project. We find no significant signal candidate and set the most stringent upper limits to date on the amplitude of gravitational wave signals from the target population. At the frequency of best strain sensitivity, between 170.5 and 171 Hz we set a 90% confidence upper limit of 5.5−25, while at the high end of our frequency range, around 505 Hz, we achieve upper limits ≃10−24. At 230 Hz we can exclude sources with ellipticities greater than 10−6 within 100 pc of Earth with fiducial value of the principal moment of inertia of 1038kg m2. If we assume a higher (lower) gravitational wave spindown we constrain farther (closer) objects to higher (lower) ellipticities.

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Message 1799954 - Posted: 1 Jul 2016, 17:31:21 UTC - in response to Message 1799949.  

Thanks for posting this info.
I think its better to say that with our current level of sensitivity we have not yet detected any probably communications.

I also believe with the future of space based LIGO technology we have a lot of room for improvement in sensitivity.

So there is still hope yet.
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Message 1799970 - Posted: 1 Jul 2016, 18:47:06 UTC - in response to Message 1799949.  

Ligo tries to detect ripples in spacetime caused by massive cosmic events that produce gravity ripples (fluctuations in the warpage of space). It is not likely that this would be a medium for sending a message or communicating amongst others on this putative alien world.

An interferometer could be used to improve the sensitivity of radio and optical telescopes however.
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Message 1800625 - Posted: 4 Jul 2016, 10:32:39 UTC - in response to Message 1799970.  
Last modified: 10 Jul 2016, 9:40:06 UTC

Ligo tries to detect ripples in spacetime caused by massive cosmic events that produce gravity ripples (fluctuations in the warpage of space). It is not likely that this would be a medium for sending a message or communicating amongst others on this putative alien world.

An interferometer could be used to improve the sensitivity of radio and optical telescopes however.


They will build a new telescope to search for gravitational waves, it will be called the Einstein Telescope. The instrument will be much more refined than the LIGO. The only question is where it will be build, a few options are Hungary and the Netherlands, the latter site has optimal soil conditions it seems.
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Message 1800651 - Posted: 4 Jul 2016, 13:26:39 UTC - in response to Message 1800625.  

I think that a gravitational interferometer would best be placed out in space.
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Message 1800703 - Posted: 4 Jul 2016, 16:04:50 UTC - in response to Message 1800651.  

I think that a gravitational interferometer would best be placed out in space.

eLISA
https://www.elisascience.org/
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Message 1816397 - Posted: 11 Sep 2016, 13:39:14 UTC - in response to Message 1800625.  

Ligo tries to detect ripples in spacetime caused by massive cosmic events that produce gravity ripples (fluctuations in the warpage of space). It is not likely that this would be a medium for sending a message or communicating amongst others on this putative alien world.

An interferometer could be used to improve the sensitivity of radio and optical telescopes however.


They will build a new telescope to search for gravitational waves, it will be called the Einstein Telescope. The instrument will be much more refined than the LIGO. The only question is where it will be build, a few options are Hungary and the Netherlands, the latter site has optimal soil conditions it seems.


http://www.aei.mpg.de/18498/03_Einstein_Telescope

The strategy behind the ET project is to build an observatory that overcomes the limitations of current detector sites by hosting more than one GW detector. It will consist of three nested detectors, each composed of two interferometers with arms 10 kilometres long. One interferometer will detect low-frequency gravitational wave signals (2 to 40 Hz), while the other will detect the high-frequency components. The configuration is designed to allow the observatory to evolve by accommodating successive upgrades or replacement components that can take advantage of future developments in interferometry and also respond to a variety of science objectives.

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Message 1820911 - Posted: 30 Sep 2016, 19:21:48 UTC

Hi all,

I just entered the SETI program.

Im actually wondering about something else though related. Im wondering how serious ufo sightings are taken. I read about the Belgium Ufo wave on wikipedia and it seems kinda legit. Seems ground radar station, f16 radar and many people on the ground more or less saw the same thing. Has SETI ever done anything with this? I mean its actually of course much more likely that they will find us first instead of we them since they might have a billion year head start...

Anyways just some thoughts.
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Message 1822196 - Posted: 6 Oct 2016, 13:31:07 UTC

Welcome to the project arnes:) I shouldn't take the UFO stories too seriously, if I were you. Most of the times, people bring them into the media for sensation.
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Message 1838845 - Posted: 30 Dec 2016, 14:59:07 UTC - in response to Message 1778910.  

My thought is that radio waves only travel as fast as light, which is extremely slow if we're talking about 'chatter' between certain parts of an interstellar alien civilization. What kinds of scientific concepts that we know of today could be used to bypass this light speed limit? Perhaps a 'quantum radio' of sorts or some kind of 'wormhole telephone'. If we do find a signal, especially if it's from this kind of civilization what would that mean? Could it serve as some kind of beacon to find intelligent life such as ourselves? Or perhaps some kind of stellar lighthouse, either trying to get us to say hi back, to get us to travel to it in order to establish contact, or some sort of cryptic signal warning us of a dangerous predatory civilization seeking to find and extinguish its future 'competition', or worse still, a message warning not to send radio signals into space due to some extraterrestrial danger. Though I like to think a little more optimistically about it. What are your thoughts on this?


Well, let's face it. At this point in human science, radio waves are the best we have. They certainly 'carry' further than smoke signals, flashlights, flag waving, etc. Perhaps in the future, if a way around the speed of light is found, we can then do better.

One thing to remember about radio waves, that may not be known by some, is that viable communications using them is not limited to the 'noise floor.' As a JPL/NASA engineer at one time, I know how it was possible for signals from our probes to be detected even tho their signal strength was so low as to be below the thermal noise floor. this could be done at least 20 dB below the floor, and maybe even 30 dB. This allows us to 'listen' a lot further out into the universe than may be suspected. However, the type of communication I'm speaking about is not 'voice,' it is digital in form, and repetitive, using a CRC, i.e., a 'cyclical redundancy code.'


Stay here on Earth. It's the only planet with DARK CHOCOLATE !!
River Song (aka Linda Latte on planet Earth)
"Happy I-Phone girl on the GO GO GO"
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Message 1838863 - Posted: 30 Dec 2016, 16:03:33 UTC - in response to Message 1838845.  

My thought is that radio waves only travel as fast as light...What kinds of scientific concepts that we know of today could be used to bypass this light speed limit? Perhaps a 'quantum radio' of sorts or some kind of 'wormhole telephone'. If we do find a signal, especially if it's from this kind of civilization what would that mean? Could it serve as some kind of beacon to find intelligent life such as ourselves? Or perhaps some kind of stellar lighthouse, either trying to get us to say hi back, to get us to travel to it in order to establish contact, or some sort of cryptic signal warning us of a dangerous predatory civilization seeking to find and extinguish its future 'competition', or worse still, a message warning not to send radio signals into space due to some extraterrestrial danger. Though I like to think a little more optimistically about it. What are your thoughts on this?


I think there's a very good chance there's some sort of "hyperwave" or "fat line" FTL, and there may be advanced civilizations chatting away in real time. But right now, we're in the same position American and other colonists were hundreds of years ago, when a physical letter traveling by sailing ship was the only choice. And I say we should look for radio signals, because it's the best we can do. Here's an interesting article: http://curious.astro.cornell.edu/about-us/137-physics/general-physics/particles-and-quantum-physics/810-does-quantum-entanglement-imply-faster-than-light-communication-intermediate

Is it wise to light a beacon? I'd say all your answers are possible. But we lit the beacon the moment we transmitted at any frequency high enough to penetrate the ionosphere into space, so it's been lit at least since the first TV transmission in the 1930's. I guess we'll find out if it was a good idea, or if it matters at all.
“Upon opening the box, Schroedinger's raccoon will be observed in one of three possible states; alive, dead, or really, really pissed off.”
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Message 1838865 - Posted: 30 Dec 2016, 16:11:13 UTC - in response to Message 1838863.  

Well said, kind Sir. :) Shall we cross our fingers, and maybe toes? :)

Fairy Tale:
A long time ago, there lived a woman.
She did not nag, bitch, or rant.
But, it was just that one day.
And it was a long time ago. :)
The End


Happy New Year!
River Song (aka Linda Latte on planet Earth)
"Happy I-Phone girl on the GO GO GO"
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Message 1838874 - Posted: 30 Dec 2016, 16:34:42 UTC - in response to Message 1838865.  
Last modified: 30 Dec 2016, 16:36:01 UTC

Well said, kind Sir. :) Shall we cross our fingers, and maybe toes? :)

Probably. But hey, look at it this way...
"Captain Yugi Nagata: We're going to die!
Alex Hopper: We are going to die. You're going to die, I'm going to die, we're all going to die... just not today."
(from the film Battleship)

Happy New Year back! :)
“Upon opening the box, Schroedinger's raccoon will be observed in one of three possible states; alive, dead, or really, really pissed off.”
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Message 1838880 - Posted: 30 Dec 2016, 16:49:57 UTC - in response to Message 1838874.  

Giggles!!!

The Lone Ranger says to Tonto: 'We're surrounded by wild indians!' Tonto replies: 'What do you mean "WE," paleface?'


Years ago...
There was a young lady from Niger
Who rode on the back of a Tiger
They returned from the ride,
With the young lady inside,
and a smile on the face of the tiger.
The End

hahahahaha
River Song (aka Linda Latte on planet Earth)
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Message 1838912 - Posted: 30 Dec 2016, 18:26:39 UTC - in response to Message 1838863.  

For a really conspicuous beacon we've already 'lighted', I'd nominate the U.S. military's old 'space fence' radar. It ran continuously from 1961 to 2013 in the atmosphere-penetrating VHF range, with over three quarters of a million watts of power. Being a space surveillance radar, it was aimed upward into space, and was swept through a sizable portion of the celestial sphere by Earth's rotation, and its revolution around the Sun.

This signal touched about 1400 star systems in the first fifty years, and many more are added with each passing year. Even though the system is now turned off, those old radio waves are on their way, and can not be recalled.

In a few years a new, continuously operating space radar will be built. It will operate in the S -band (2 to 4 GigaHertz. It could be even more conspicuous, as there is less background noise there, than in the VHF range.
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Message 1838914 - Posted: 30 Dec 2016, 18:37:52 UTC - in response to Message 1838912.  

Friday December 30 2016, 10:34 AM PST

Wow, I didn't know about that! But, remember Stephen Hawking's advice, which I paraphrase as follows: "Be careful what you wish for." :)

By identifying ourselves as being in the "Goldilocks Zone" we may well invite aliens who would like to remove us and take over our planet. :(

That is a valid worry, isn't it? How do we know others in the universe are as peace-loving as we are? :)

"Light travels faster than sound. This is why some people appear bright until you hear them speak."
River Song (aka Linda Latte on planet Earth)
"Happy I-Phone girl on the GO GO GO"
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Message 1838925 - Posted: 30 Dec 2016, 19:30:45 UTC - in response to Message 1838914.  

How do we know others in the universe are as peace-loving as we are? :)


Since when has the Human Race been peace loving ????? just heard on the news Siryia's ceasefire is breaking down and that ain't even 24 hrs old .

Yea we are a world full of peace loving people , what a pile of BS
Life is what you make of it :-)

When i'm good i'm very good , but when i'm bad i'm shi#eloads better ;-) In't I " buttercups " p.m.s.l at authoritie !!;-)
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Message 1838929 - Posted: 30 Dec 2016, 19:42:46 UTC - in response to Message 1838925.  

How do we know others in the universe are as peace-loving as we are? :)


Since when has the Human Race been peace loving ????? just heard on the news Syria's ceasefire is breaking down and that ain't even 24 hrs old .

Yea we are a world full of peace loving people , what a pile of BS


WHAT you just pointed out above, i.e.., "Since when has the Human Race been peace loving ?????" is exactly WHY I used the phrase "Peace Loving."

Others OUT THERE just may be like US, sad to say, and is exactly why, I think, Stephen Hawking said what he did, and I paraphrased. :)) What he said was a sad warning. :(
River Song (aka Linda Latte on planet Earth)
"Happy I-Phone girl on the GO GO GO"
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Message boards : SETI@home Science : Do you think aliens use radio waves to communicate with each other?


 
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