The endlessly ongoing search for extraterrestrialintelligent life for some smoothly and imperceptibly flows into a real obsession. Scientists cannot understand why we still have not found anyone, despite all our attempts and the theoretical basis, which clearly hints at a completely different outcome. Recently, more and more new hypotheses have appeared explaining our loneliness. For example, according to one of the latter, the matter may be in ourselves. However, the German astrophysicist Michael Hippke of the Sonneberg Observatory has a different opinion on this subject.
According to a German researcher, one of the mostThe serious difficulties that extraterrestrial civilizations can face in their way of exploring and exploring outer space is gravity, which can simply block access to space even to technologically advanced aliens.
But what about people, you ask? After all, in less than 100 recent years, mankind has not only found a way to go beyond the atmosphere of our home planet, but also begun an active study of other planets of the solar system. So why could advanced extraterrestrial civilizations not do the same?
The problem, according to Hippke, lies in the planets themselves, which these (hypothetical) extraterrestrial civilizations (hypothetically) call their home.
According to the most common amongAccording to astronomers, the most suitable planets are the so-called super-earths - rocky exoplanets, which have significantly higher mass indicators in comparison with our Earth, as well as a denser atmosphere that can protect the conditional forms of life located on the surface or below it. It is such planets, according to scientists, that can possess all the resources necessary for life. However, they have one serious drawback.
“The more massive the planet, the more expensive it is to launch a space from it,” Hippke commented on Space.com
In his study, Hippke calculated the necessarythe level of thrust that the spacecraft will need in order to break out of the atmosphere of the average super-earth or even a more massive planet. According to the calculations, the use of conventional rocket fuel in these cases will quickly transfer such launches from the category of expensive to impossible.
For example, to run the classicApproximately 400,000 tons of fuel will be needed from the surface of the super-earth from the Apollo program rocket, which, according to Hippke in his article published in the online library arXiv.org, “is equivalent to the mass of the Cheops pyramid, and also, probably, is the real limit for missiles operating on the basis of HRE (chemical rocket engines). Anything more will be too expensive. ”
Hippke calculations show that usingRDR-based spacecraft using conventional fuel will be possible, but too impractical for civilizations living on the surface of super-earths. However, if we are talking about even more massive worlds, then in this case their inhabitants will have to look for alternative options for power plants, for the possibility of going out into space, one of which may be, for example, nuclear power plants.
The larger the planet and its mass, the lessbecomes the efficiency of chemical fuel. Lack of efficiency = increased consumption. Increased consumption = reduced economic feasibility. Ultimately, Hippke notes, so much fuel will be required for each launch that it will generally reduce the number of possible launches and, as a result, the development of the space program.
But since we are talking about hypothetical extraterrestrialcivilizations, it is quite possible, we are talking about completely different, completely different from our technologies, allowing them to explore outer space. Nevertheless, we have yet another perfectly reasonable explanation for why we still have not found anyone in space.