Alien life in space: Extraterrestrials were able to see Earth – Panorama

Ithaca – Are we alone in the vast expanses of space? British physicist who died in 2018 Stephen Hawking Was sure: humans should be quiet because aliens can see us as rivals. But as astronomers are now, it is too late Lisa Kalteneger From the Carl Sagan Institute at Cornell University in the United States Jacqueline Baherty vom American Nature Museum zeigen.

The fact that the Earth inhabits the Earth can be seen around the radius of 300 light years of many light stars. The humans who live there have similar or better binoculars than us. Radio signals from Earth have now arrived in even these 75 systems, write both scientists in a special journal “Nature”.

4000 foreign planes were discovered

“In our search for life in the universe, from our point of view, the planets that pass unnoticed in front of their stars are currently our best candidates,” explains Kaldenegar and Fahrdi. Such exoplanets, now discovered by astronomers to more than 4,000 people, offer good opportunities to study their atmospheres.

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“Finding many planets in the habitable zone of a star like the red dwarf star Tropist-1 is a great discovery because it means there may be more habitable planets per star than we thought,” explains Exoplanet expert Kaldenegar. “Finding more rocky planets in a more habitable zone will definitely increase your chances of finding life.”

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But can from any stars Extraterrestrial astronomers Discover humanity? According to previous estimates, it could be between 100 and 1000 stars. “However, previous investigations have only taken into account the current status of the stars,” Kaldenegger and Fahrdi insist.

But the stars are in constant motion, so the perspective shifts towards the earth and the sun. Both researchers are now taking into account for the first time the impact of stellar motion on the Earth’s visibility.

List European Gaya Mission. The Space Laboratory has been measuring the positions and motions of more than a billion stars in the Milky Way since 2014. In their analysis, Chaldean and Fahrti cover a period of 5,000 years – the beginning of the first high civilizations on Earth – up to 5,000 years into the future.

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Tropist 1 star system

Effect: A total of 2034 stars up to about 300 light-years away are in a region where the Earth’s changes can be seen completely or temporarily in front of the Sun The seven stars are the hosts of the outer planets. For example, the Tropist-1 system, home to seven Earth-sized planets, entered the region in 1642 and remained there for 2371 years.

The distance from Tropist-1 to Earth is 39.13 light-years – equivalent to 370 trillion kilometers. The distance between the Earth and the Moon is just 384,400 kilometers.

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Signals from aliens?

“There is a lot of debate about whether we should actively send signals or cover up our presence,” Kaldenegger and Fahrdi write. But this debate seems meaningless to both scientists, because “the biosphere has changed our planet’s atmosphere for billions of years.”

So alien astronomers may have known for at least a billion years that life evolved on Earth. Then they will not lose the look of a technological civilization.