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Giant radio telescope sets date for ET hunt

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zep73

11 messages. 11 destinations out of billions. In a 54 year period. That's all humanity has broadcasted. Ever. A very narrow window, given our 300,000 year existence as an intelligent species.
The first of those 11 RB's will arrive in 2029. The last will arrive in the year 25,974.
It is now being considered, if we should stop completely, due to the risk of hostile aliens.

https://en.wikipedia.org/wiki/List_of_interstellar_radio_messages

So the question is: Why are we listening, when we know such an RB window can be so narrow? And that intelligent beings are unlikely to expose themselves in the long run?

Waste of time and money.

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NCC1701

Because we can.

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Waspie_Dwarf
2 hours ago, sci-nerd said:

11 messages. 11 destinations out of billions. In a 54 year period. That's all humanity has broadcasted. Ever.

Total and utter nonsense. 

Even a very basic understanding of radio signals should make it obvious that the fact that we have only transmitted 11 DELIBERATE message is not the same thing as saying that is all the signals humanity has broadcast ever.

Every radio signal, every TV transmission has left this planet and leaked into space. In certain wavelengths the Earth outshines the sun. Our presence is detectable to any alien species with a radio telescope. Any sufficiently advanced civilisation within a 100 light years knows we are here.

If there are alien races out there that use radio communications they should be detectable to us.

You are entitled to your opinion that it is a waste of time and money,  but maybe you should at least base that opinion on fact not nonsense. This NASA article might help: https://history.nasa.gov/CP-2156/ch5.4.htm

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zep73
2 minutes ago, Waspie_Dwarf said:

Every radio signal, every TV transmission has left this planet and leaked into space.

I disagree. Those signals have the strength of a ripple passing the Pacific ocean. Undetectable several light years away.

But I'm not getting into an argument with you again. I've had enough of your obsession with anything space related. Had enough of you.

Don't bother replying.

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Stiff

Well, if it was 'Made in China' it will only last a couple of months at best before it's broken.

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bison
Posted (edited)

Those observations about how our routine radio transmissions can be detected over only very short distances, cosmically speaking, are typically based on the assumption that their receivers are about as good as our own. There's nothing to stop a much more technically advanced species from making radio telescopes substantially, or even hugely better than our's.

Its even been shown that it would be possible to use a star, as if it were a lens, to collect radio, or any other electromagnetic energy. That would make for a collector area millions of times greater that our best efforts, with proportionate sensitivity to weak signals.    

Edited by bison

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tmcom

An advanced race would have a true quantum computer and telescopes on every planet in their solar system, so they could directly see the Earth, and a good number of others in our galaxy, then also see if pollution is present or structures. And if they collabrated with other species, then our entire galaxy's habitable planets are already mapped out.

:P

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TigerBright19
Posted (edited)

Classic opening scene.

 

What do aliens hear?

 

Edited by Aaron2017

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