An advanced civilization, based on Drake’s equation It can quickly establish colonies in various galaxies, so the lack of extraterrestrial settlements in the solar system suggests that such advanced civilizations do not exist. This argument usually Fermi’s paradox is named.
Maybe the believers Drake’s equation They have found a good explanation for why we have not been able to detect alien civilizations so far. to report Universe TodayResearchers based in the United States have published a new study that explains why; In the following, you will read its description.
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If the Drake equation is true, then what is extraterrestrial life looking for?
Before anything else, it might be better to address that Drake’s equation What is?
Frank Drake The professor emeritus of astronomy and astrophysics has devised an equation with which we can estimate the number of extraterrestrial civilizations that can be traced to the Milky Way. After its invention, the Drake equation was widely used to search for extraterrestrial intelligence, but despite its effectiveness, we still have not been able to find any extraterrestrial life; It is worth mentioning that many researchers have criticized and confirmed this equation, which we will review together.
Details of the Drake equation
variables Drake’s equation It consists of (Wikipedia, 2011):
where in:
N:The number of extraterrestrial civilizations we can contact.
R* : Average rate of star formation in our galaxy.
fp : the proportion of these stars that have planets.
ne : The average number of life-probable planets orbiting each planet-bearing star.
f ℓ : The ratio of planets in which life actually forms during their lifetime, to the number of planets in which there is a possibility of life forming.
fi : The proportion of planets with life that can have intelligent life (civilization) in them.
fc : Proportion of technologically advanced civilizations with detectable signals in the galaxy.
L: the length of time in which civilizations are able to make contact (civilization lifespan).
According to Wikipedia, by entering the parameters of this equation for the Milky Way galaxy, the number of extraterrestrial civilizations for this galaxy will be around 100.
In 1950, Enrico Fermi and Michael Hart encountered a large statistical gap in the application of the Drake equation to estimate the number of civilizations in our galaxy. Even if the Drake equation showed a high mathematical probability for the existence of advanced alien civilizations, and then Fermi and Hart asked themselves, if such a thing is true, why haven’t we seen one yet?! Finally, what should have happened and this doubt was called Fermi’s Paradox!
Years later, Hart published a detailed paper in which he analyzed Fermi’s Paradox, stating that civilizations could expand rapidly by sending spacecraft and space structures into the galaxy of their choice and travel to the nearest 100 stars. do And besides, by repeating this process, such civilizations will develop rapidly in a short period of time and have many colonies.
Seti’s logic does not fit!
Maybe it’s better to talk about SETI in the first place:
The search for extraterrestrial intelligence ( Searching for Extra-Terrestrial Intelligence Or SETI) is the name given to scientific projects aimed at finding extraterrestrial intelligence. In fact, researchers analyze the signals received from space, which are in the electromagnetic spectrum, i.e.: radio and visible light.
Well, it’s time to address Hart’s calculations, according to which our galaxy can be navigated in only six hundred and fifty thousand years, and an advanced civilization should have contacted humanity by now. Since no such contact had ever been made, Hart concluded that there were no alien civilizations, and ultimately, missions such as Sethi They are not logical.
But what if the sun is not enough for extraterrestrial life?
Recently, in an article published by the journal Astrophysical Accepted for publication, Yacoub Haq-Misra and Thomas Fausz of the Blue Marble Space Science Institute and American University, respectively, have Fermi’s paradox they point
The authors believe that since not all stars in galaxies are the same, it would make sense for alien civilizations to be a little more sensitive in their colonization. Another 2021 study found that long-lived civilizations prefer low-mass star systems. K and M – Dwarf choose to maximize the lifespan of their civilization in the surrounding galaxies.
So alien civilizations are likely looking for certain types of stars when trying to establish an intragalactic base, and our Sun simply doesn’t meet their criteria.
Both K and M dwarf stars are long-lived stars compared to a yellow dwarf like our Sun. While it may not make a huge difference to humans, the authors suggest that alien civilizations capable of colonizing solar systems would certainly take this into account when making decisions.
The Drake equation and the future of the search for extraterrestrial intelligence
Regardless of how advanced a civilization is, trying to colonize the solar system still requires a lot of resource allocation, and an intelligent civilization wouldn’t gamble its resources on a star that will die out soon, even if it means a few million years.
According to the researchers’ estimates, it would take an advanced civilization about two billion years to reach all the low-mass stars, and several civilizations may already be doing so in our own Milky Way galaxy, which we can’t see simply because Remove having and not having a shelter. Therefore, programs like Sethi They can help us identify them.
In our lifetime, we certainly won’t be able to replicate their success, but that doesn’t mean we shouldn’t look for signs from them. Yakub Haq Misra.
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Source: Interestingengineering