Thanks for addressing my points. I agree there is promise here, just not sure how much.

Another thing is that I found some references that the solar wind can not propagate frequencies below 100 Khz. This seemed very odd to me since I assume all frequencies can propagate in space. This was mentioned in two or three papers as the local ionization cutoff frequency.

Anyone know about this? Is there a lower frequency limit in our solar system???

The two papers listed at the bottom are some very good reading, you should be able to find these papers with google. Did you know earth's aurora borealis power is 1E8 watts with freqencies between 100 Khz and 1 Mhz? Also each magnetic field of planet, has a unique freqency? That means if you could listen in space between 100 Khz and 1 Mhz, each planet you could hear would have slightly different signal! We can't hear this on earth because of the ionosphere.

Also, I found there are NO sky surveys at 10Mhz and below from space. We got no idea what this band looks like in space.

I don't think our 50/60 hz power leakage is in the 1E8 watt range :) We should listen for aurora frequencies first, then maybe we would get lucky with finding lower freqencies.

Magnetically-Driven Planetary Radio Emissions and Application to Extrasolar Planets Philippe Zarka

Low Frequency Radio Astronomy & Extrasolar Planet Detection Jonatan Danielsson

Very low frequencies have been used for communications by our Nations submarines. These are propagated in water and basically are sound waves.

Very low frequencies have been used for communications by our Nations submarines. These are propagated in water and basically are sound waves.

That may well be the case now but that is communication by mechanical compression waves, more commonly known as sound.

You can have electro-magnetic radiation at low frequencies that are still "radio waves". One very good transmitter is the earth itself due to ducting through the ionosphere powered by lightning strikes to give 7.8 Hz. See Schumann resonance.


Some Radio Hams record ELF/VLF radio to pick up disturbances in the Earth's (EM) environment.

The military have played with such low EM frequencies but I don't know if anything practical was achieved.


I wonder if any other planets or stars 'transmit' a characteristic resonance at radio frequencies that can then be picked up?...

Keep searchin',
Martin

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See new freedom: Mageia Linux
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Hmmmm, sirzerp made a very good point there. sirzerp i read the shorter of the two papers, the other one was 50 pages long.

If we want to "see" pictures of exoplanets around other stars, its real difficult with telescopes operating in the optical or IR wavelengths. But, as suggested in those science papers, if different planets with different magnetic field's emit different radio wave patterns, then that could be the future for exoplanet hunting!! And searching for ET!!

Pretend for one moment that an earth size planet with a similar magnetic field as our own might emit radio waves at, lets say 5,580Hz. Well then as suggested by sirzerp, maybe a radio antenna array like the new LOFAR in Holland might be able to take a radio image of the sky without any stars, just the exoplanets in the 5,580Hz range for instance.

Now that would be a massive break through for exoplanet hunters!!

John.

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Does SETI reports any potential ETI signals?

Does SETI reports any potential ETI signals?

No, they tell us nothing!

I've been posting messags in this forum for about 5 years now and i've never heard a peep out of the SETI scientists. If they have ET signals, i didn't hear anything about it! To be honest, i think they stopped looking about a year and a half ago.

John.

That is very disapointing, i wonder if SETI scientits ever read the comments in this forum. The SetiHome is a wonderfull experiment for us non-astronomers to participate in nevertheless.

... To be honest, i think they stopped looking about a year and a half ago.

Oh no...!

We haven't scared them away have we?!

(Or are we too primitive for them to be disturbed from their own searches?)


Keep searchin',
Martin

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See new freedom: Mageia Linux
Take a look for yourself: Linux Format
The Future is what We all make IT (GPLv3)

C Olival,
Don't be put off, i'm just being sarcastic. This SETI@home project is not a completely fruitless venture even if the project isn't currently detecting any ET signals!

Let me tell you why!!

By the very nature of science itself, SCIENCE CHANGES when new research is published!! Thats critical!! What does that mean?? It means that you never know what new scientific research will come onto the scene that changes the whole ball game. Tomorrow, next week, next year or whenever, some scientists somewhere could find a new way to detect ET. Maybe at a different radio frequency or something that the SETI@home scientists are not currently aware of!

So for that reason alone, NEVER give up hope. Science does, and always will change. New science is just around the corner! You just need to be patient. And we can chat and discuss our hopes and dreams right here in this SETI science forum!

I will never loose faith that new science is on its way! I'm really glad the SETI scientists who run this project allow us to participate in the science and chat here on this forum! We are very lucky to be part of this. We just need to allow the scientists to do their job. Maybe they read the messages, maybe not, i really don't know :) Sometimes i post smart comments and hope one of the scientists does read the message. You never know.

John.

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The cosmos is a big place, our own galaxy has over 200 billion stars, perhaps more, just a question of time until life is found outside Earth. Will that be achieved via Kepler and ground telescopes? A combination of both for certain. More likely life will be detected when telescopes are powerful enough in picking up bio marks in the atmosphere of an exoplanet; more likely that will happen first before SETI does find ETI signals. Does SETI and Paul Allen Array ever points their radio dishes to the stars that currently Kepler is observing?

Does SETI and Paul Allen Array ever points their radio dishes to the stars that currently Kepler is observing?

Yea, they can point the ATA at any target they choose.

John.

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Does SETI reports any potential ETI signals?

No, they tell us nothing!

I've been posting messags in this forum for about 5 years now and i've never heard a peep out of the SETI scientists. If they have ET signals, i didn't hear anything about it! To be honest, i think they stopped looking about a year and a half ago.

John.

They don't tell us anything, because there is nothing to tell. I would need to do some research, but I am pretty sure a few crunchers got credit for their computers discovering a few pulsars (I recall a few news pieces about that). And from time to time rumors circulate that they did find something, and it turns out to be untrue. That may have been the case with the pulsar story I recall too.

I also interviewed a scientist with this program in an article I wrote. It can be seen here: Searching for asteroids, extraterrestrial life a little more rocky: Budget cuts threaten to close Arecibo, world's largest radio telescope

So they do pay attention and sometimes comment when it's necessary. But they aren't going to scream WE FOUND SOMETHING...if nothing has yet been found. Even if they did find ET or something, then it would take time and research before an announcement is made.

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"By faith we understand that the universe was formed at God's command, so that what is seen was not made out of what was visible". Hebrews 11.3

I also interviewed a scientist with this program in an article I wrote. It can be seen here: Searching for asteroids, extraterrestrial life a little more rocky: Budget cuts threaten to close Arecibo, world's largest radio telescope.

Jason,
Nice article, well written :)

John.

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I also interviewed a scientist with this program in an article I wrote. It can be seen here: Searching for asteroids, extraterrestrial life a little more rocky: Budget cuts threaten to close Arecibo, world's largest radio telescope.

Jason,
Nice article, well written :)

John.

Thanks! I was slightly wrong though. It was Einstein@home which discovered the pulsars: Citizen Scientists Make First Deep Space Discovery With Einstein@Home. Still cool though. It also proves that our work here will eventually yield something.

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"By faith we understand that the universe was formed at God's command, so that what is seen was not made out of what was visible". Hebrews 11.3