Scientists have recorded a signal from the planet Gliese 581d and have already managed to declare that the conditions on it are suitable for the origin and maintenance of life. At the moment, it is known that the celestial body is 2 times larger than the Earth. The signals have been recorded for a very long time, but only in 2014 it was possible to notice that they are repeated, are cyclical. Not a single phenomenon in the universe is capable of this, unless, of course, it is created artificially.
Signals indicate the presence of an extraterrestrial civilization on the planet, trying to send a message to neighboring systems and galaxies. But the "letter" has not yet been deciphered.
About the planet
Gliese 581d is an exoplanet in the system of the same name (Gliese 581). At the moment, its existence is not precisely determined, but everything points to the fact that it really exists. The planet is located in the constellation Libra, and quite close to our solar system. It is only 20 light years away.
According to information received in September 2010,the planet in question in its system is in fifth place from the star (Earth is in third, after Venus and Mercury). Many scientists call it "Super-Earth" because it is twice the size of the Earth. And its mass is 6-8 times more.
The first report that a potentially habitable exoplanet has been discovered was received from Switzerland on April 24, 2007. Together with Gliese 581d, Gliese 581c was also recorded. The discovery belongs to several astrologers, whose actions were supervised by Stefan Oudry.
Scientists are still arguing about the reality of the planet, but there have always been skeptics in matters of space exploration.
Discovery process
According to British experts, their team of astronomers has picked up a message from the planet Gliese 581d. When the information is confirmed, disputes and discussions about the existence of a celestial body will be finally terminated. Now there are many opinions on this matter, starting with the reality of the planet and ending with physical anomalies that earth technology captures.
At first, there was only one way to detect celestial bodies. They are viewed through the most powerful telescopes when they pass in front of their star. It was this technology that American scientists used in 2014.
But their British colleagues expressed doubts about the relevance of the method. With it, you can only find gas giants, like our Jupiter. They themselves used more modern technologies that confirmed the location and realityplanets.
Gliese 581d is currently known to be a potentially habitable planet located in the red dwarf system of the same name. It is 20 light years away.
Signal characteristics
When scientists first recorded a signal from the planet Gliese 581d, they did not attach much importance to it. Then the very existence of her was under a big question, there were numerous discussions about this. Some astronomers still consider the signals to be a simple manifestation of stellar activity, but increased, because otherwise they would not be able to reach the solar system.
In 2014, American scientists repeatedly tested the characteristics of the received signal. They did not find any evidence that it is fed artificially. Astronomers suggest that it is the result of light and magnetic radiation propagated by a red dwarf. When crossing, they gather, creating a special cosmic noise that could not be captured before.
March 7 this year, it became known that the signal from the potentially habitable planet Gliese 581d is not the result of cosmic noise. It repeats every few months, has a similar cycle.
Skeptic debate
After the planet's discovery report was received, the data was cross-checked with HARPS. But the discovery of Swiss scientists was not confirmed. Russian astronomers also made attempts to find a celestial body using their technologies up tountil 2012. Then the scientist Roman Baluev expressed doubts about its reality.
In 2014, attempts to confirm the existence of Gliese 581d were made by astronomers at the University of Pennsylvania. Calculations were carried out that refuted the information of Stefan Oudry. According to them, recorded phenomena are only a consequence of stellar activity.
In the early spring of 2015, the debunking of Gliese 581d was questioned. British scientists explored American astronomers' planetary detection methods. They said that these methods are far from perfect and do not meet modern requirements.
Thus, if the planet Gliese 581d itself is questioned, the signal from it also does not exist. At least today there is no clear evidence of its reality.
As for the signal, skeptics point to light and magnetic radiation. When they are intertwined, they can make characteristic sounds that a person has mistaken for an extraterrestrial message. Its cyclicality is actually absent. The signal changes, but very slowly, like everything that happens in the Universe (relative to human life).
Hypotheses and simulations
Despite disagreements with astronomers from many countries, British scientists believe in the existence of the planet Gliese 581d. Moreover, they insist that the given signals represent a certain algorithm of encrypted characters. Those combined are a message to neighboring systems and galaxies.
Astronomers from Britain are confident that if they use not only high-tech equipment, but also modern research methods, they will be able to separate the signal itself from interference. After that, you can try to decrypt it. Perhaps a civilization from the Gliese system is also trying to find its brothers in mind.
Thanks to numerous computer simulations, it was possible to establish that there are water oceans on the planet in question. The presence of the atmosphere and clouds with precipitation in the corresponding zone is also noted. And as already mentioned earlier, in order for life to arise, water is needed. Therefore, Gliese is suitable in all respects for habitation. It is located in a favorable zone relative to its luminary, has water, and clouds with precipitation indicate its circulation.
Signal data
No one can say exactly when the signal was first sent from the planet Gliese 581d. Initially, he was not taken seriously, since then the celestial body itself was not discovered. Later, after the first talk about him, more attention was paid to the reality of the planet, and not the message.
Up until the spring of 2015, it was believed that the signal is ordinary cosmic noise. Similar sound waves have already been picked up by terrestrial equipment, and more than once.
Now astronomers claim that the signal repeats with a small interval. It's littered with static, but attempts are being made to clear the message. Ultimately, scientists plandecode signals from a potentially habitable planet.
Communication with alien civilizations
If it happens that Gliese 581d really turns out to be a real-life planet with its population, then humanity needs to be more careful in trying to start a dialogue with it. Scientist Stephen Hawking has repeatedly urged people to beware of communication with alien civilizations.
He argues that the resources of any celestial body that has something similar to the globe are limited. They may stop. And then the inhabitants will have no choice but to look for a similar planet to use it as a source of resources.
Conclusion
Despite the abundance of debate and skeptical discussions around the planet Gliese 581d, many scientists, as well as all the people of the Earth, would very much like it to be inhabited. Then humanity will have the opportunity to share experience and knowledge, breakthroughs in technology, medicine, programming.
In the end, all people would like to go on a journey beyond the solar system. And the planet Gliese 581d is a great destination. It remains only to arrange a visit with its population. Perhaps this can be done if scientists still decipher the received signal.
