Laser technology could be used to attract attention from aliens

Pew! Pew! Pew! Powerful Laser Beacon Could Show Aliens Earth Is Inhabited

The signal should be easy to detect from as far away as 20,000 light years.

According to the scientists, the laser beam would be observable from nearby systems, such as those in the vicinity of Proxima Centauri, the closest star to Earth, or TRAPPIST-1, a celestial body at about 40 light-years away that houses seven exoplanets with three of which could be habitable.

James R. Clark imagine that a message could be sent at a transmission rate of a few hundred bits per second, and that would happen in a few years.

Clark's study shows that building this magnified laser is possible and that it could serve as a signal to alien life. "If alien astronomers were looking at the sun, the spectrum of the sun would gain a little spike in it". "I don't know if intelligent creatures around the sun would be their first guess, but it would certainly attract further attention", said Clark in a press release.

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To create such a powerful signal, he toyed with different combinations of telescopes and megawatt lasers. In the conclusion of the study, the experts are optimistic because they highlight that "withthe technology and the facilities existing or to come over the next decade, humanity is capable of producing a signal detectable despite the presence of the Sun". As a result, you will create a beam of infrared light that will be strong enough to stand out on the background of solar energy. According to his calculations, a 2-megawatt laser paired with a 30-meter telescope would do the trick, as would a 1-megawatt laser paired with a 45-meter telescope. This would produce a beam with a staggering range of 20,000 light years.

Both scenarios would require laser and telescope technology that has either already been developed, or is within practical reach. He compares it to the Air Force's Airborne Laser program, known as the YAL-1, a prototype from the Reagan era which consisted of a 747 with a giant laser grafted onto the nose, meant to shoot down ballistic missiles. He also found that while a 30-meter telescope considerably dwarfs any existing observatory on Earth today, there are plans to build such massive telescopes in the near future, including the 24-meter Giant Magellan Telescope and the 39-meter European Extremely Large Telescope, both of which are now under construction in Chile. Clark's plan for the telescope's safety is one straight out of Moonraker: put the laser on the Moon. While the beam wouldn't be visible, it could still damage people's vision if they were to look directly at it. "In general, this was a feasibility study".

Megawatt Laser Beam: Good Or Bad Idea?

At the present time, impossible to tell whether we are alone in the universe and if this is not the case, scientists are ready to do anything to attract the aliens to us ...

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