In 1974, researchers sent about 21,000 radio frequency messages from the Arecibo telescope in Puerto Rico to the M13 cluster. Scientists have tried extraterrestrial communications using radio waves in the past.
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The frequencies above and below the water hole are relatively “noisy” because they are full of quantum oscillations and the rest of the radiation. At this frequency - 1420 to 1720 MHz - hydrogen And hydroxyl (bonding air The two components of water, the hydrogen) molecule, act as a kind of chemical “soundproofing”, absorbing lower and higher vibrations and relatively freeing the channel from the background noise of the universe. This is because the frequency of the radio waves fills a convenient gap in the electromagnetic spectrum known as the “water hole”. Of the various types of electromagnetic waves Radio waves It is the usual recourse of such communication. But even in our ever-changing galaxy, scientists have come up with some ways to convey our location to anyone else there. “But nothing is fixed in the galaxy.” Stars and planets are constantly flowing, moving around each other in slow cosmic waltz. Astrophysicist Héctor Socas-Navarro told Live Science. “If you want to tell someone where you are, you need some common references, right? Ideally a fixed reference.” The Astrophysicist Institute of the Canary Islands, the Spanish archipelago of the Atlantic Ocean.
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There are several techniques scientists can use to send directions to aliens far away, but more importantly, researchers have to figure out how to send our guests an easy-to-read map of the galaxy. But if there is an intellectual being somewhere, how can we connect with them on Earth and, assuming we want to be friends, how do we tell them our planet? Will you give directions to? Given all that time and space, it is possible that someday, someday, another spark of intelligence has burned up. The universe is unimaginably large and surprisingly old.
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