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We are not alone in the universe, the faith in the world, many Alien Fans as well as established scientists. The search for extraterrestrial life-forms and, above all, to the planet, friendly to the environment, provide the conditions for the emergence of life, since some time, to the challenges of researchers.
But you could also go the other way: By making of alien, intelligent life-forms of our civilization’s attention. As the could go, explain to James Clark and Kerri Cahoy of the Massachusetts Institute of Technology (mit) in Cambridge, in the journal “The Astrophysical Journal”.
So it would be with the existing laser technology possible to send from the earth a laser beam into space, which will be noticed by alien life-forms.
The Aliens are there and now what? Study of extraterrestrial life, The Aliens are there and now what?
One of the challenges is the sun to a distant civilization could be as far to outshine that of the artificial light signal alert. With a two Megawatt infrared laser that is lit by at least 30 meters large telescope sniper bundled into All, possible, report the authors. Under optimal conditions, the Signal could be then, even in up to 20,000 light-years distance, write to – or about 80 percent of the distance to the center of the milky way.
The Laser would have to be very strong, and the telescope is very large, but both lying within the limits of available technology. “It would be a challenging project, but not impossible,” says Clark.
telescope with a 39 metre
the European southern Observatory builds waiting Eso in Chile, a telescope with a 39 meter diameter for astronomical observations Andes currently. And the U.S. air force has already developed a Megawatt Laser that should be used to shoot down enemy missiles from the sky, but are now decommissioned.
For comparison: a laser pointer are usually about a billion Times weaker than the Laser, the researchers to the alien propose to search. Satellite in earth orbit would have to beware of the beam, to avoid any risk of damage.
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in Addition, could be used even for communication, stresses Clark. Laser-beam messages left with a few dozen characters per second, light years far into space to transfer. Depending on the distance of the other civilization of the entertainment, however, would be tedious.
Hawking was sceptical to arrive to a contact
Even if we should bump to the next neighboring star to the sun, Proxima Centauri, to a willing civilization, would any answer from there only after eight years. Proxima Centauri is about four light-years. In the case of a 500 light-years from civilization, a reply came only after 1000 years.
“Basically, this was a feasibility study,” stressed Clark. “Whether it is a good idea or not is a discussion for future Work.” The deceased Astro-physics genius Stephen Hawking had shown himself sceptical about a contact. Aliens could come to us, to loot and to destroy.
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Two other U.S. researchers had proposed two years ago, to hide the earth with the help of laser technology in front of curious Aliens. David Kipping and Alex Teachey from Columbia University in New York assumed that extraterrestrial astronomers to distant planets in a similar way, look for how alien researchers: you look for the slight dimming of a star that occurs when one of its planet moves in front of him.
The Planet is shadowed, then, temporarily, a small part of the star. Exactly, this shading could be Kipping and Teachey, with a bespoke Laser offset, and in this way, the existence of the earth obscure.
correction: laser pointers are roughly one billion Times weaker than the co-researchers described Laser. In the Text, the factor of a Million.
joe/dpa
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