Here’s how tiny lasers could help us find alien life

FOR YEARS researchers have used radio to try and detect extraterrestrial life – but now scientists have turned to a laser in the hope of finding aliens.

Last year, the Search for Extraterrestrial Intelligence (SETI) announced a program called LaserSETI to detect potential laser pulses originating from outside the solar system.

Researchers at SETI are trying a laser approach to detect alien life

In order to achieve this goal, though, SETI needed to build a network of instruments for monitoring the entire night sky.

And in late December 2021, the scientists finally finished installing a second device that features an expensive lens-camera-computer combo at Haleakala Observatory, located on a mountaintop in Maui, Hawaii.

This new instrument is unprecedented when it comes to the search for alien life, as for seven decades researchers have relied mostly on stray radio waves that can only scan just a tiny fraction of the sky (and not for a long time, either).

“Messaging by light has a fundamental advantage over radio in that it can, in principle, convey far more bits per second – typically a half-million times as many,” SETI researchers wrote in an official statement.

“This increased bandwidth is a characteristic that would make lasers useful for communicating with off-world colonies, for example,” the officials added.

The east-facing instrument at Haleakala will be used in conjunction with a similar west-facing device at the Robert Ferguson Observatory in Sonoma, California.

Together both instruments can scan a 150-degree arc of the night sky more than a thousand times a second to detect laser pulses, which could be a potential sign of intelligent life.

Still, while the two instruments are a huge step towards improved space exploration, several more are needed around the world to fully cover the night sky.

“We’re trying to cover all the sky all the time,” Eliot Gillum, the head investigator for the LaserSETI project, told The Daily Beast.

All-sky coverage around the clock is researchers’ best bet for detecting extraterrestrial life, according to Berkeley astronomer Dan Werthimer, as “a typical astronomy research telescope [can only] look at about one-millionth of the sky at a time.”

“So if E.T. is flashing us once a day, once a month, or once a year, we’d be very lucky to detect the flash with a telescope that can only examine a small part of the sky,” Werthimer added.

GettyHaleakala Observatory, located in Maui, Hawaii, is home to a new LaserSETI instrument.[/caption]

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