Stealth laser cloak helps Earth escape aliens

The laser beam will create an invisible cloak when the Earth passes through the Sun, making aliens unable to detect the Earth's existence.

According to the BBC, some scientists are skeptical about people revealing their existence in the galaxy. They are concerned if aliens visit Earth, they may be unfriendly and bring many diseases.

According to David Kipping and Alex Teachey of Columbia University, New York, USA, lasers can provide a solution if we don't want to touch aliens. The team calculates the conditions that help the Earth to stealth and publishes a discovery on March 30 in the monthly monthly Astronomy Society of the Royal Astronomical Society.

Invisibility cloak helps the Earth not be detected by aliens.(Photo: Space).

The method developed by the Kipping and Teachy team is contrary to the way scientists are using to find distant planets orbiting another star. Accordingly, astronomers will not stop watching the star and waiting for an object to pass in front of it. When the horizontal movement takes place, starlight will fade.

The Kepler telescope of NASA has discovered more than 1,000 planets in this way. If high intellectual civilizations exist outside the Earth, it can be assumed they also use the same method to search for another world like our planet, the researchers said.

According to the team's calculations, a 30-megawatt laser beam emitted continuously for 10 hours a year is enough to compensate for the dim light when the Earth passes through the Sun.

"We don't need a giant laser generator . It could be a beam around the Earth. Or you can put it in space as a satellite, and we calculate the International Space Station provided. exactly the amount of energy needed , " said Professor Kipping.

The study applies to laser systems operating in visible light. However, Professor Kipping admits that a laser cloak that can shield every wavelength of light will require a series of lasers with a total capacity of up to 250 megawatts.

Another alternative that the team proposed is to use a laser generator to mask all the prominent parts of the Earth as a characteristic atmosphere, including oxygen, ozone and methane.

"If we invisible all biological features, another civilization can detect our planet as it passes through the Sun, but the Earth will be like a dead world and make them lose interest." , Professor Kipping said.