Liputan6.com, New York – A new paper published on November 5, 2018 in The Astrophysical Journal, explained that humans are able to build infrared lasers that are hot and bright enough to lure aliens to come to Earth.
This technology must be large enough, but still logical. The design proposed by the researchers will require 1 to 2 megawatts of laser, and at least the main mirror is 100 feet (30 meters) in diameter.
"However, we do not yet know whether aliens will soon recognize the laser as a signal from human life on Earth," said James Clark, a graduate student at the Massachusetts Institute of Technology and the author of the study.
"However, it will certainly attract their attention (aliens)," he continued, as quoted from Live ScienceOn Friday (11/09/2018).
The big challenge to building an alien laser lighthouse is that the Earth is not the only planet that "lives alone" in space. The earth is one of eight planets orbiting the sun, while sunlight will be much brighter than a man-made laser.
From the perspective of alien astronomers that are hundreds of light years away, the entire human civilization and any type of infrared will be drowned out by a huge source of white light in our galaxy space.
The making of the giant laser, Clark said, was not intended to emit a ray of light in the dark for aliens, but how to make the sun look strange enough from an alien perspective.
"Aliens who are in outer space may have noticed that our sun is surrounded by many planets. At least, one of these planets might be inhabited by them. However, if we show that laser directly to aliens while they are watching the sun, then the center the solar system should be ignored by them, "Clark said.
Under normal circumstances, stars can be distinguished by the amount of light that is produced. However, focused lasers can make output sunlight is much more varied in the infrared spectrum.
Instead of creating a flicker that blinks in the dark, Clark's laser will make the sun look like a weak light.
If the alien detects the laser signal and understands its significance, then it is possible that humans can regulate communication channels with data transfer speeds of up to 2 Mbps (megabits per second).
"Similar to a modern, slow internet connection. Of course, there will be a delay of several decades between sending and receiving messages, thanks to the speed of light," Clark continued.
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