Scientists Figured Out Where Aliens Might Be Hiding — And How We Could Talk to Them.
Should we or should we want to Contact E.Ts ? (if they are not here already) ....How risky could that be ?
If we did manage to do so...What are the odds they would be good or Bad ETs ?
Is it really like Star Trek/Star Wars out there in the Universe ? :-\
At the edges of our galaxy, tens of thousands of light-years away, massive, dense clusters of stars glom together like a humongous interstellar house party. This is where, according to astrophysicists from the Harvard-Smithsonian Center for Astrophysics, we might find intelligent alien life.
The CFA's lead author, Rosanne DiStefano made this hypothesis at a meeting of the American Astronomical Society on Wednesday, and — believe it or not — her logic checks out.
Let's say finding intelligent life is a hypothetical one-in-a-million chance. By the center's estimation, there are 150 globular clusters in our Milky Way galaxy, each holding roughly a million stars per 100 million light years. Plus, they're old — like, 10 billion years old — and stable, meaning they didn't get nailed by cataclysmic, planet-destroying gamma-ray bursts.
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.Scientists Figured Out Where Aliens Might Be Hiding — And How We Could Talk to Them
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It could be that these globular clusters are full of planets twice as old as our own, that had billions more years to develop. The Fermi paradox, a theory of why alien life hasn't found us yet, refers to these clusters as Planet X.
To date, according to the center, only one planet has been found in a globular cluster. This may be because, according to current theories, the globular clusters in our galaxy don't have the heavy elements to build stable planets.
But DiStefano and her colleague, Alak Ray from the Tata Institute of Fundamental Research in Mumbai, said it's premature to say there aren't planets in these clusters. Exoplanets, or planets that orbit a stars other than our own, have been found near stars that have just one-tenth of the heavy elements of our own sun.
In fact, if these globular clusters do have planets, they're probably extremely close together. That means those planets could communicate much easier with one another than with Earth. "We call it the 'globular cluster opportunity,'" DiStefano said on Wednesday. "Sending a broadcast between the stars wouldn't take any longer than a letter from the U.S. to Europe in the 18th century."
So there could be a chance that Earth is missing out on a huge game of galactic Telephone that's being played on the edge of the Milky Way, with intelligent societies working together to noticeably expand farther into the universe. But according to Robin Hanson, a research associate at Oxford University's Future of Humanity Institute, that would've happened by now.
"If there were life thousands of light years away, it could've been around for millions or billions of years," he told Mic. "If someone is alive out there, they would've long since developed as much as they can. If they didn't spread out [to Earth], it means they're stuck. And just being near other civilizations [in the globular cluster] doesn't make them any less stuck, no matter how much they developed economically and socially."
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.Scientists Figured Out Where Aliens Might Be Hiding — And How We Could Talk to Them
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That doesn't mean we couldn't communicate. The issue is that communication is a two-way street. Two civilizations need to look for each other at the same time, know exactly where the other one is and know how to contact it.
"If everyone is looking in random directions, the chance of coordinating communication is small," Hanson told Mic. "You have to find another coordination structure."
Hanson told Mic about a theory for sending a signal to an alien race, as long as that race has a particular human tendency. It involves really, really bright lights — in this case, a supernova.
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.Scientists Figured Out Where Aliens Might Be Hiding — And How We Could Talk to Them
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A supernova is a rare event in which a star violently explodes at the end of its life, giving off a huge amount of light and energy. A civilization would need to turn that flash into what you might call a cataclysmic carrier pigeon.
"Right after you see a supernova, you piggyback off that and send a signal in the same direction," Hanson told Mic. "When you see that light, it will move past the cluster. So there will be that burst of light, and right behind it, the signal. You're going to be waiting a while, but when you see that, we can use it to figure out how to talk effectively."
But keep this in mind when you're thinking about potential planets on the edge of the galaxy. The Milky Way galaxy is roughly 100,000 light-years across. The nearest globular clusters, NGC 6397 and Messier 4, are about 7,200 light-years away. So if we try to send communications to any of the who-knows-how-many planets within them, it would take 7,200 years to receive.
So if you read Mic, aliens, please pick up some of our galactic slack and say hi — we promise we won't try to kill off your entire species.
http://news.yahoo.com/scientists-figured-where-aliens-might-193611218.html
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HELLO OUT THERE!!!
A little over 100 years ago we started using radio
Marconi In 1898, he flashed the results of Kingstown Regatta to Dublin Newspaper's office, making first ever public broadcast of sports event. But his wireless telegraph only transmitted signals. Voice in radio came in the 1921. Soon after, in 1922, he introduced short wave transmissions.
Okay so 1922 was the first real radio with shortwave So until 1922 not much radio was leaking out into space.
The company's most important early contract was the construction, in 1905-1906, of five high-powered radiotelegraph stations for the U.S. Navy, located in Panama, Pensacola and Key West, Florida, Guantanamo, Cuba, and Puerto Rico.
So only in 1906 did we get strong enough radio to reach ships off shore
The point is that radio travels at the speed of light so our early radio didn't have much range let alone enough power to carry a modulated signal (speech)
Even later signals by the time they reached about 20 light years out from earth would be little but noise hidden in the background noise of space
There are very few stars withinn 100 light years from Earth Any aliens living 60 LYs out would just now be getting WWII and the NAZIs broadcasts Any aliens beyond 100 light years...
WOULD NOT EVEN KNOW WE EXIST :P
(unless they happened to be in the hood :P )
Now lets say we beam a tight message to say Gliess 581G (20.5 LY away) Well we know where that planet is and can aim at it
However our planet is moving at 1.8 million miles per hour And any other planet out there is also moving at similar speed
So lets say you are listening for a signal and you record spots a WOW signal... A few hours later you spot it in your data recorder.
Now you try to find it again But in the hours that pass both you and the source of the WOW signal are moving and you don't know which direction the sources is moving in So all you can hope for is that the signal was broad enough to catch it in a sweep
(This is the excude SETI gives... that nay signal like a TV broadcast would radiate our and we should be able to get it again)
I don't buy that I think its more like trying to pick up a flashlight beam from a ship being tossed in a major storm. You get a flash and then its gone.
There was a SETI scientist who picked up a LASER like signal once and it was gone
People in general assume that since we have been broadcasting for years the whole universe knows about us :P Hell those two pioneers carrying that message plate just barely left the outer solar system Be centuries before they get as far as the closest star
Earth is a Rim World LITERALLY we are at the edge of the galaxy and 50 light years 'above' the plane We are in the middle of nowhere
Think about it
While I believe we have been visited we are not being buzzed by them in the hundreds on a daily basis as most believe
These are the star within 50 LY Only a few have planets
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