Imagine that you visiting your friend for the weekend and your friend works for the SETI (Search for Extra-Terrestrial Intelligence), I am sure you are all familiar with them, they sit around all day, everyday for the last 48 years or so scanning the universe for signals that come from the darkness of space looking to see if any of these signals demonstrate the hallmarks of intelligence i.e., some type of pattern. Said in short... they search the heavens for intelligent life in the universe.
And in all those years the SETI project has had really only one "wow" moment where a signal resembled something "other" than random noise. Now of course this "wow" moment didn't really amount to much other than a few characters lined up a tad more orderly than usual. I attached the "wow" signal below so you could see the minor order in the sea of randomness.
All the efforts of Seti to-date amount to the same thing as looking at the universe through a 3-foot long soda straw. We really haven't looked at much at all... just a few thousand nearby stars. New technology is coming on line... a few elements of the Allen telescope array are up and running... which will increase our present abilities 1,000 fold, and more. Soon, there will be several million stars subject to the Seti search.
But lets imagine that on the weekend you were visiting something much more than a "wow" moment occurred. Lets imagine that a signal was detected emanating from the depths of space that read.....
"people of earth, we would like to introduce ourselves to you we are a race of intelligent creatures that lives in a galaxy far, far away and we want to communicate to you that you are not alone in the universe.".
Obviously, this message would be one of the most incredible discoveries in the history of mankind.
Such a message would be a hoax. We're looking at the electromagnetic spectrum, and there's a speed limit... the speed of light. The NEAREST neighboring galaxy is Andromeda... and that's about 2.5 million light years away. That means that the aliens would have had to started their message on its way... about the time that 'Homo habilis' was bopping around the savannas.
But what would you believe? Would you believe it was actually sent from an intelligent life source from another galaxy? Or would you believe it was merely an amazing coincidence of chance that caused a random signal to just appear to have that amazing understandable order?
See above. Random... horseshit (excuse the language... I think the proposition warrants it.)
Now, I am pretty sure that a signal coming from outer space that had 40 words in a comprehensible order... (i.e., "people of earth, we would like to introduce ourselves to you we are a race of intelligent creatures that lives in a galaxy far, far away and we want to communicate to you that you are not alone in the universe.") is still FAR, FAR, FAR, more likely to occur by chance than a tennis ball passing through a brick wall or a picture of Marilyn Monroe juggling fish, accidentally generated on a computer screen by random pixels.
Agreed... although not from as far away as you have proposed. First of all, we've only been 'lit up' (emitting electromagnetic radiation) for around 100 years... and not with any appreciable power output until World War II (radar sets). So... only civilizations within 60 light-years will even have had a reasonable opportunity to 'notice' us.
Therefore, I would love an honest answer from all of you to the following question.... (finally I get to my question)
Would you be able to determine based on that signal from space that their was intelligent life in the universe, and they were trying to communicate with us? Or would you deny the existence of intelligent life and write off the message as being merely the product of random chance that was "bound to happen"?
What would be your assumption and why?
Thank you in advance for your honest answer.
I think that such a signal is highly unlikely... but if it does happen, it's not going to be any time soon.
However, there IS a high likelihood that there are other life-bearing planets... LOTS of them. Recent advances in astronomy have revealed that planets around other stars are the RULE, rather than the exception. There have been over 200 discovered so far... but they're mostly gas giants, mostly at least a few times larger than Jupiter. There have been a few 'rocky' planets found that could be considered 'earth-like'... but they're several times bigger than earth... and that's about all that we know about them, so far.
Within the next 20 years, there will be new space-based and ground-based telescopes coming on line that will enable us to not only detect earth-like planets... we'll be able to spectrographically analyze atmospheric gasses, and determine whether life is present.
People think that earth is special because it has an oxygen atmosphere. What they don't know is that when life took hold on earth, there was NOT an oxygen atmosphere... in fact there was very LITTLE free oxygen. Early life... over the first few billion years... CREATED the oxygen-rich atmosphere. In other words, out planet and life evolved together... interactively.
Personally... I think that life is only a couple of orders of magnitude less common than dirt, in the universe... and that within the next 20 to 30 years, that will be demonstrated beyond the shadow of any doubt.
What'cha gonna do then?