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A laser cloaking device to hide Earth from aliens

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Post by Ben Reilly Fri Apr 01, 2016 7:15 pm

Are we really alone in the universe? Since no one really knows for sure, a laser defense system can help conceal planet Earth from advancing alien civilizations, a new study proposed.

Many prominent scientists have long cautioned that intelligent life on other planets could be doing the same thing we are doing - looking for life outside our planet. One popular technique is by analyzing the light variations when a planet moves in front of a star it circles.

Using this technique, the Kepler mission already found more than 1,000 planets and many of them are similar to the Earth's size. The researchers theorized that alien civilizations could take a page from our books and locate our planet using the same technique.

Earth's location is right smack in the habitable zone of the sun, which renders it a promising new place for relocation. Several scientists are worried that the arrival of extraterrestrial life - if they do exist - could deplete the Earth of its resources.

Graduate student Alex Teachey and Professor David Kipping from Columbia University proposed of a laser defense system to conceal our planet from aliens. When the controlled laser is beamed directly at a potentially alien-populated star, it will make up for the dip in light.

The researchers said that a consistent emission of 30 MW laser for 10 hours once a year could mask the transit signal (dip in light) at least in visible light. The International Space Station gathers almost the same amount of energy every year. A chromatic cloak, which is effective in all wavelengths, requires a larger tunable laser array with 250 MW of total power.

http://www.techtimes.com/articles/146196/20160401/laser-defense-system-may-hide-planet-earth-from-aliens.htm
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Post by Ben Reilly Fri Apr 01, 2016 7:17 pm

Not mentioned in the source, but worth considering -- what if other alien species are already doing this, and that's why we haven't found any?
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Post by Victorismyhero Fri Apr 01, 2016 8:36 pm

bit late innit?
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Post by HoratioTarr Fri Apr 01, 2016 9:49 pm

Lord Foul wrote:bit late innit?

They're probably already here.
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Post by 'Wolfie Sat Apr 02, 2016 2:38 am

Cool

THOSE two clowns suggesting this, also seem to be assuming that said potential alien invaders are using the same technnology..

WHAT IF some maleficent alien (un)civilisation were using a totally different technology to ours ?


beam me up
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Post by Guest Thu Apr 07, 2016 10:38 pm

WhoseYourWolfie wrote:Cool

THOSE two clowns suggesting this, also seem to be assuming that said potential alien invaders are using the same technnology..

WHAT IF some maleficent alien (un)civilisation were using a totally different technology to ours ?


beam me up


A laser cloaking device to hide Earth from aliens  Tin-foil-hat

Well, just for 'shits & grins'...there has been quite a karfarckle of FB posts asking about the RUMOR that China wants to beat everyone and build a 'MOON BASE'!  And from that advantage post be able to drop NUKS down upon anyone and everyone that they deemed unworthy! 

And what better place to build and test nukes? 
A laser cloaking device to hide Earth from aliens  Nuclear_Explosion

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