Some of the newly discovered potentially habitable exoplanets
Despite the fact that scientists still have not found evidence of the existence of extraterrestrial civilizations, we can't accept the fact that there is, in the vast endless space of the ocean, no one else. One of the most important discoveries of recent decades was the discovery of exoplanets, which orbit around their stars in the habitable Zone (zone Goldilocks) – a region in space, determined on the basis of the calculation that all surface conditions located in it planets similar to the conditions on the Ground. The most promising in this respect are the planet on which surface water exists in the liquid phase. However, not all scientists share the delight of discovery «next» samplemodel exoplanets. But why?
The First earth-like exoplanet Kepler-186f was discovered in 2014, it is located at 492 light years from Earth in the constellation Cygnus. Kepler-186f is special exoplanet. The fact that its size is almost the same as our planet, and it orbits in the habitable Zone. According to the calculations of researchers from NASA, the illumination on the surface of the planet reaches 32% of the earth. If the planet has a dense atmosphere, in theory, on its surface, water can exist in liquid form, so – in theory, of course – and intelligent life. However, before we attempt to imagine the look the inhabitants of Kepler-186f, let's take a look at is not very pleasant for us as a species concept, known as the Great filter.
Great filter is one of the famous attempts to resolve the Fermi paradox – the absence of visible traces of alien civilizations, which would spread throughout the Universe over billions of years of its development. After all, we still have not found aliens, despite the existence of hundreds of billions of stellar systems in nearby galaxies, which could develop life. And, frankly, it's just very strange.
Kepler-186f — the first planet almost the same size as the Earth which orbit in the habitable Zone.
The Apparent absence of thriving extraterrestrial civilizations suggests that at least one of the steps on the way to becoming an interstellar civilization is extremely unlikely. So we remain alone because either intelligent life is extremely rare in the Universe, or tends to disappear. The time for the appearance of an alien civilization called the Great filter.
Scientists are trying to determine the exact time of the onset of the Great filter for more than 50 years. Explanations may include lack of earth-like planets or self-replicating molecules. In General, the question of the origin and even the very definition of life remains controversial. Read more about why read .
Proponents of the hypothesis about the lack of earth-like planets in the Universe argue that the evolution of complex life requires a huge amount of ideal conditions, or let's face it, coincidences. In addition to the fact that the Earth is in the habitable Zone, the Sun should be far enough away from the galactic centre to avoid destructive radiation, supermassive black holes, gas giants of our solar system must sweep away the asteroids trajectory of the Earth. These are just a few prerequisites for the necessary conditions for the emergence of complex life. The emergence of symbolic language, tools and intelligence could require other such «ideal conditions».
While the appearance of intelligent life may be rare, the silence could also be the result of intelligent life in the Universe does not appear so often, and can exist very long. Can every sufficiently advanced civilization stumble across a suicidal technology or unsustainable trajectory of civilization? We know that a Great filter prevents the emergence of prosperous interstellar civilizations, but we don't know, was it mankind or is it awaiting us in the future.
For 200,000 years humanity has survived volcanic eruptions, asteroid impacts and natural pandemics. But our track record of survival is limited to only a few decades since the invention of nuclear weapons. Technology, pomschyu which we will be able to go to interstellar travel and survive on other planets we have.
In the case of Kepler-186f, we still have many reasons to believe that intelligent life on this exoplanet may never appear. Its atmosphere may be too thin to prevent freezing or there may be other, favorable conditions for life.
As writes the edition , some respected scientists such as the astronomer Royal Martin Rees of Cambridge centre for the study of existential risk point to advances in biotechnology as potentially catastrophic. Others, such as Stephen Hawking, Max Tegmark and Stuart Russell, also expressed serious concern about the exotic but understudied possibilities of artificial intelligence.
Do Not forget about climate change: recall that inlast year 11 thousand scientists from around the world warned world leaders about that But does it mean that you better hope that Kepler-186f is barren? Response
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