According to “RT”, the aim of this idea was to send a clear message to the alien civilizations that live in other places of the solar system to say: We are here.
Von Letru never saw his idea fruition, however, long after he proposed his ambitious plan, scientists have not stopped their attempts to connect with life beyond Earth.
What messages have we sent to the aliens?
The radio achieved the quest to announce the existence of the Earth. In 1962, Soviet scientists directed a radio transmitter to Venus and greeted the planet with a Morse code. This message, which is the first of its kind, included three words: Mir (in the Russian language means “peace” or “world” ), Lenin and SSSR (Latin alphabet for the name of the Soviet Union).
The message was considered largely symbolic, according to a 2018 article in the International Journal of Astrobiology.
The message was, more than anything else, a test of an entirely new planetary radar, a technology that sends radio waves into space, whose primary goal is to observe and map objects in the solar system.
The next attempt to reach aliens was much more ambitious. In 1974, a team of scientists, including astronomers Frank Drake and Karl Sagan, sent a radio message from the Arecibo Observatory in Puerto Rico towards Messier 13, a group of stars about 25,000 km away. Light year.
The image, sent in binary code, contains a diagram of a man and a woman, the structure of the double helix of DNA, a model of a carbon atom and a diagram of a telescope.
“The Arecibo Observatory message attempted to give a glimpse of our identity as human beings in the language of mathematics and science,” Douglas Vakocch, a psychologist and president of Messaging Outraterrestrial Intelligence (METI) International, told Live Science.
The Arecibo message was, quite literally, a bullet in the dark, and it would take about 25,000 light-years to reach Messier 13, and at that point, the star cluster would have moved, according to Cornell University’s astronomy department.
And virtual aliens may still be able to detect the signal as it passes, as the intensity of the radio signals emanating from them is 10 million times the intensity of the radio signals from our sun (the sun emits a wide spectrum of electromagnetic radiation, from ultraviolet rays to the radio), but this is unlikely, he said. Seth Shostak, an astronomer at the Research Institute for Extraterrestrial Intelligence (SETI).
“It was, in a sense, the strongest message,” Shostak told Live Science. “It’s like a giant billboard on the I-5 highway in the United States, but it’s locked up in a field somewhere.”
More recently, radio has been used to transmit everything from art to advertisements, and in 2008, Doritos launched its own advertisement for a solar system in the constellation of the Big Dipper, some 42 light-years away, according to an article published in the International Journal of Astrobiology.
And in 2010, a message written in Klingon, a language used by fictional creatures in the US television series “Star Trek”, invited “real” aliens to attend the Klingon opera in the Netherlands.
And not only did we rely on radio to communicate, humans have also launched a spacecraft containing artifacts from Earth, hoping to eventually be ejected from interstellar space by intelligent life forms.
Voyager 1 and 2 were launched in 1977 to explore the outer extensions of our solar system and interstellar space. Each carries a golden record containing music and surrounding sounds from Earth and 116 images of our planet and our solar system.
The “Voyager” spacecraft is still traveling through interstellar space, waiting to be discovered, but the chances of that happen, according to Sherry Wells Jensen, a linguist at Bowling Green State University in Ohio who specializes in extraterrestrial intelligence: “zero”.
“It was just a beautiful, poetic and courageous endeavor that really sums up our best, even if it was meaningless in terms of actual communication,” she added.
Experts agree that the likelihood of any of these attempts reaching alien civilizations is low, and this outcome depends, of course, on whether there is alien life in our star system, but this life in question must listen closely to radio signals and understand enough about mathematics and science to explain Our messages, finally, and the messages we have sent tend to assume that these aliens sense the universe in the same way we do: with hearing and sight.