Friday , November 27 2020

Chinese scientists say they have the key to building a space elevator. What?



<p class = "canvas-atom kanal-text Mb (1.0em) Mb (0) – sm Mt (0.8em) developed carbon nanotube fibers they are strong enough to be used to build a space elevator. The research team of Qinghua University patented technology and published part of its research in the journal Nature Nanotechnology earlier this year. "Chinese scientists have developed a carbon nanotube fiber that they think is strong enough to be used to build a space elevator." The Qinghua University research team patented the technology and published part of its research magazine Nature Nanotechnology earlier this year.

They said the fiber would be "in great demand in many high-end areas like sports equipment, ballistic bumps, aeronautics, astronautics and even space elevators." But is it a lift that can really travel from Earth to space, or is it just science fiction?

<h4 class = "canvas-atom canvas text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content =Space elevator? Why?"data-reactid =" 33 ">Space elevator? Why?

<p class = "fabric-atom-canvas-text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content = of a drive ever invented … space vehicles are still grossly ineffective, "writes science fiction author Sir Arthur C Clarke The Fountains of Paradise "Although generations of research have made the rocket the most reliable form of propulsion ever invented … space vehicles are still grossly ineffective," writes science fiction author Sir Arthur Clark The Fountains of Paradise in 1979

The novel is the first popular narrative of an idea described by the Russian scientist Konstantin Tsiolkovski in 1895: the space elevator, a space-to-space system, just like the elevators we use daily but 300,000 times higher.

The attraction of the space elevator is to potentially find a much cheaper way to travel to space. It costs more than $ 160 million to launch a satellite for a trip, but it is supposed that a space elevator could reduce that to less than 2 million. per person per trip.

<h4 class = "canvas-atom canvas text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content =How it works?"data-reactid =" 39 ">How it works?

The basic concept of a space elevator includes a cable attached to the ground and attached to a counterweight that is sent into space. If the cable is long enough – 36,000 kilometers or three times the diameter of the Earth, it will be pulled and erected by gravity and centrifugal force.

The theory is that the vehicle can move on the cable driven by Earth's rotational energy. This would revolutionize the space travel, but designing and finding a strong enough material for the idea is extremely challenging.

Japan launched two satellites in September in the first experiment to study the movement of the elevator in space, including a mini-lift that travels from one satellite to another. He has not yet reported the results. China has also tested space testing, but did not reveal the details.

<h4 class = "canvas-atom canvas text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content =Who came up with this idea?"data-reactid =" 52 ">Who came up with this idea?

Tsiolkovski missile launcher first set out the concept in 1895, predicting a heavenly castle in space bound to Earth with a massive tower. Russian engineer Yuri Arutyutanov took it further, developing a modern version of a space elevator based on Tsiolkovski's model.

American engineer and space scientist Jerome Pearson published the first technical report on the concept in 1975, which won the attention of the scientific community. Four years later Sci-Fi writer Clarke popularized the idea by using Pearson's design in his space elevator novel.

Since then, scientists have been trying to refine the design and develop new materials to bring the concept to reality.

<h3 class = "fabric-atom texture-text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content =Who needs street lighting? The Chinese city is planning a fake moon"Who needs street lighting?" The Chinese city plans a fake moon

<h4 class = "canvas-atom canvas text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content =What makes building a space elevator so challenging?"data-reactid =" 57 ">What makes building a space elevator so challenging?

The three biggest challenges that need to be overcome are boom, dynamic stability and strength. Scientists believe they can control bending and dynamic stability with a satellite in geostationary orbit at the right altitude to ensure that the cable is not removed from Earth gravity or cast off.

But the problem of strength is not yet resolved because the space elevator will need material strong enough to withstand the enormous weight and strain.

<p class = "fabric-atom texture Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content = "required weight / weight ratio is theoretically available in the perfect crystal graphite whiskers, "writes Pearson in his article published in the magazine Act Astronautics"The strength requirements are extremely demanding, but the required weight / weight ratio is theoretically available in the perfect crystalline graphite whiskers," writes Pearson in an article published in the magazine Act Astronautics,

The ultra-light, ultra-strong cable needed for a space elevator will require tensile strength – to withstand stretching – of at least 7 gigas, according to NASA. The Qinghua team says their newest carbon nanotube fibers have a tensile strength of 80 gigascal.

Nicola Punoño, a professor of solid and structural mechanics at the University of Trento in Italy, said the new fibers of Chinese researchers are promising.

<h3 class = "fabric-atom texture-text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content =Hotels in the cosmos – the ultimate limit for luxury trips or pure science fiction?"data-reactid =" 83 "> Hotels in the cosmos – the ultimate limit for luxury travel or pure science fiction?

"Mb (0) – sm Mt (0.8em) – sm" type = "text" content = "" strength and tolerance to deficiencies is the biggest challenge " , said Puno Nature Nano report [from the Tsinghua team] is a key step towards solving … so never say never. "" Having a strong mega cable and maintaining its strength and tolerance for the flaws, this is the biggest challenge, "said Poohno. Nature Nano report [from the Tsinghua team] is a key step in the solution … so never say never. "

<p class = "Canvas-Atom Canvas-text Mb (1.0m) Mb (0) – sm Mt (0.8em) Chinese scientists say they have the key to building a space elevator. What? first appeared South China morning mail"Data-reactid =" 85 "> This article Chinese scientists say they have the key to building a space elevator.

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