Humanity is again confronted with the Fermi paradox: why do aliens ignore us

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Humanity is again confronted with the Fermi paradox: why do aliens ignore us

Сообщение HainanWel.com(e)! » 05 мар 2017, 21:37

In anticipation of the last press conference NASA sotsseti were excited by hundreds of thousands of comments, they say, they finally found aliens! Unfortunately or luckily, a miracle did not happen: on three of the seven planets of the TRAPPIST-1 system there may be water and an acceptable temperature for the origin of life, but life itself is only a hypothesis. The planets were discovered by the precession method; Measured how the light of the star changes as it passes through the celestial body, and the data is sent through the spectrograph. You understand, you will not see much of this. On the other hand, there are dozens of similar planets on which life can exist. Potentially, they are only one billion in one Milky Way. And mankind is all asking the question: why, with such an abundance of space for life, we have not yet written to the chat room?

TERMINOLOGICAL REFERENCE

The Kardashev scale. This is a hypothetical distribution of civilizations according to the amount of energy consumed. The first type uses the energy of the planet. The second is the energy of the native star. The third is the energy of an entire galaxy.

The Fermi Paradox. It sounds like this: there are many arguments in favor of the fact that the universe is filled with advanced technical civilizations, but we do not see traces of their presence. Where is everybody?

Large Filter. This is some kind of large-scale event in the universe that any life can face. Chances to pass it and stay alive are extremely low, so we do not meet aliens: they did not pass it. Or will not pass.

UNIVERSE AND WE: DIMENSIONS AND FIGURES

Texts of this kind are to be started as follows: one day on a clear summer night I lay on the ground and looked up into the sky, from where countless stars staring at me. Further it should be noted that these stars are by no means innumerable - only about 2500. This is not much. In a large truck, even bricks can be transported more, not to mention apples. But we, of course, do not dwell on this.

The complete "address" of our planet in the universe looks something like this: Solar system - Local interstellar cloud (we share it with Alpha Centauri, Altair, Vega, Fomalhaut and Arcturus) - Local bubble (the region of rarefied gas in which our neighbor is Mircam) Gould's belt (a group of young massive stars from different constellations, from Cepheus to Wolf and Scorpio) - the sleeve of Orion (a small sleeve of the galaxy, only 11 thousand light-years in length) - and finally, the Milky Way (modest, in general, Structure in which a minimum of 100 billion stars).

The Milky Way itself, together with 14 proven galaxies (including Andromeda, Magellanic clouds and other Dragons with Lions) and 50 probable candidates for the role of its satellites form the Subgroup of the Milky Way. She, in turn, is part of the Local Group, that - in the Local Sheet, that - in the Local Supercluster of the Virgin, and that already - in Laniakia, which in Hawaiian means "immense heavens." This is about 100 thousand galaxies, stretched for 520 million light years. And the observed universe is a ball about 93 billion light-years in diameter.

BILLION WORLDWIDE. And about 5 to 20% of the stars in it look like our Sun. And this, according to the most modest estimations, is 500 billion billion stars. Of course, the earth-like exoplanets probably do not spin everywhere (although this was suddenly found even in the nearest neighbor, Proxima Centauri, just 4 light-years away). But there are a lot of them - about 100 billion billion.

We reduce the search area to the Milky Way. In it, according to modest estimations, there are about a billion earth-like exoplanets. Thanks to the telescope Kepler, we know about 16, which seems to hang like a sign "enter and live" (some of them even tried to show in Interstellar). </ P>
And now, like Enrico Fermi, let's ask ourselves: if the universe is, by all indications, teeming with life, why have not we been so visited so far?

Milky-way-916523

"SIGNALS": QUICK PULSES AND CHANGES TO THE STARS

The last decade, however, differed: perhaps, they still try to talk with us. We are talking about the so-called "fast radio pulses", single powerful radio signals, lasting several milliseconds. The first radio telescope was caught in Australia back in 2001, but only in 2007 data were processed that allow it to be calculated. Since then, scientists have understood what to look for, and - voila! - rapid impulses showered one after another (now they are taken about twenty).


With them, however, there are problems: American astrophysicists have discovered that, together with radio emission, there are gamma-ray bursts, whose energy is a billion times greater than its value for the radio range. This makes it possible to compare the signal with a supernova explosion, which means that it carries a potential danger to the Earth (I already wrote earlier that a gamma-flash is accused of genocide).


Perhaps "fast radio pulses" is the dispersal of alien ships on solar sails.

There are many explanations. Chinese astrophysicists point to the passage of electromagnetic radiation through the reinforcing asteroid belt. Their colleagues from the US talk about neutron stars, black holes and their interactions.
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