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🌍 "Are we alone in the Universe?" This dizzying question is one that everyone has asked themselves. As science and technology advance, astronomers are constantly developing new and ever more precise ways to one day discover extraterrestrial life. In 1970, the first messages were sent into space to intelligent alien civilizations. And even if we still haven't received an answer, scientists are convinced that life can only be present in the Universe, elsewhere than on Earth. We embark on a grand journey through our solar system and further into the heart of the Universe in search of clues to the existence of extraterrestrial life.

🔥 As a reminder, the videos are published on SUNDAYS at 6:00 PM.


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💥 Extraterrestrial Life In The Universe:
- Finding traces of extraterrestrial life in the Universe is, by the way, one of the missions of the James Webb telescope, which studies, among other things, the atmosphere of exo-planets. I remind you that exo-planets are planets that revolve around stars other than our Sun. The first one was discovered in 1995 and since then, 5,000 have been discovered! The James Webb telescope is placed in orbit around the Sun at 1.5 million kilometers from the Earth.
I'll answer the question that's been burning in your mind: is the James Webb Telescope likely to find life beyond our planet? The answer is yes! The American astronomer Frank Drake established in 1961 what is called the Drake equation. This equation quantifies the potential number of intelligent civilizations other than our own. According to Drake's equation, there would be a high quantifiable number of intelligent extraterrestrial civilizations, and we should find more technological than biological evidence of these civilizations. For example, long-range electromagnetic signals. Why? Simply because technological traces last longer than biosignatures, which are for example traces of methane or water, essential for the development of life, or organic molecules. Astronomers will therefore be able to find traces of technology left by a civilization that has already disappeared for thousands of years! In addition, scientists have determined that biosignatures would be less reliable and less easily detected than technosignatures.

Have you ever heard of the Fermi paradox? This paradox hides a series of questions, which the Italian physicist Enrico Fermi asked himself in 1950, while debating with his friends the possibility of extraterrestrial life. Why has mankind found no evidence of extraterrestrial civilizations when the Sun is far from being the oldest star in our galaxy? Other civilizations have necessarily lived and died out being more technologically advanced than us. There should remain traces of these civilizations, visible from Earth, like radio waves. Scientists have proven that humanity is detectable throughout our solar system! So where are the aliens or their representatives?

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