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



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<p class = "canvas-atom canvas-text Mb (1.0em) Mb (0) – sm Mt (0.8e) has developed a carbon nanotube fiber it is said to be strong enough to be used to build a space elevator. Tsinghua University's research team patented technology and published part of its journal research Nature Nanotechnology earlier this year. "Chinese scientists have developed a carbon nanotube fiber that they say is strong enough to build a space elevator." Tsinghua University's research team patented the technology and published part of their research in the Journal Nature Nanotechnology earlier this year.

They said that fiber would be "very demanding in many top-level areas such as sports equipment, ballistic armor, aeronautics, astronautics and even space elevators." But is it an elevator that could travel from Earth to space, in fact, possibly, or is it just a matter of science fiction?

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

<p class = "canvas-atom canvas-text Mb (1.0em) Mb (0) – sm Mt (0.8m) – sm" type = "text" content = spacecraft are still extremely inefficient, "writes science fiction writer Sir Arthur C Clarke Fountains of paradise in 1979. "Although research generations have made the rocket the most reliable propulsion ever invented … spacecraft are still extremely inefficient," writes science fiction author Sir Arthur C Clarke Fountains of paradise in 1979.

The novel was the first popular commentary on an idea depicted by Russian scientist Konstantin Tsiolkovsky in 1895: the space elevator, a space-space transport system, as well as the lifts we use daily but 300,000 times larger.

The call of a space elevator is reduced to finding a much cheaper way to travel in space. It costs more than $ 160 million to launch a satellite for a single trip, but it is estimated that a space elevator could reduce that value to less than $ 2 million per person per journey.

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

The basic concept of a space elevator involves a cable anchored to the surface of the Earth and attached to a counterweight that is sent into space. If the cable is long enough – 36,000 km (22,369 miles) or three times the diameter of the Earth – it will be pulled up and upright by gravity and centrifugal force.

The theory is that a vehicle could travel along the cable, propelled by the rotating energy of the Earth. This would transform the revolution into 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 lifts in space, involving a mini-lift that travels along a cable from one satellite to another. Has not yet reported the results. China also conducted space tests, but did not disclose the details.

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

The Tsiolkovski rocket scientist first exposed the concept in 1895, imagining a heavenly castle in the space bounded by Earth by a massive tower. Russian engineer Yuri Artsutanov continued to take over, developing a modern version of a space elevator based on Tsiolkovsky's model.

American engineer and space scientist Jerome Pearson published the first technical note on the concept in 1975 that drew the attention of the scientific community. Four years later, science fiction writer Clarke popularized this idea using Pearson's model in his novel about the space elevator.

Scientists have since tried to regulate design and develop new materials to bring the concept closer to being a reality.

<h3 class = "canvas-atom canvas-text Mb (1.0em) Mb (0) – sm Mt (0.8m)Who needs street lights? The Chinese city is planning the false moon"data-reactiontid =" 56 "> Who needs street lights?

<h4 class = "canvas-atom canvas-text Mb (1.0e) Mb (0) – sm Mt (0.8em)What is the construction of a so challenging space elevator?"data-reactid =" 57 ">What is the construction of a so challenging space elevator?

The three major challenges that need to be overcome are buckling, dynamic stability and strength. Scientists believe they could control the buoyancy and dynamic stability with a satellite in geostationary orbit at the right altitude to make sure they are not pulled by the Earth's gravity or flight.

But the problem of resistance has not yet been solved because a space elevator would need a material strong enough to withstand the massive weight and tension involved.

<p class = "canvas-atom canvas-text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content = perfectly graphite, "Pearson wrote in his paper, published in the journal Acta Astronautica"the resistance requirements are extremely demanding, but the necessary resistance-weight ratio is theoretically available in the perfect graphite crystal moss," wrote Pearson in his paper, published in the journal Acta Astronautica.

The ultra-light, ultra-strong cable required for a space elevator would require tensile strength – to withstand stretching – of not less than 7 gigapascals, according to NASA. The Tsinghua team says the latest carbon fiber nanotube has a tensile strength of 80 gigapascals.

Nicola Pugno, professor of solid and structural mechanics at the University of Trento in Italy, said the new fibers of Chinese researchers promise.

<h3 class = "canvas-atom canvas-text Mb (1.0em) Mb (0) – sm Mt (0.8m)Hotels in space – the ultimate frontier for luxury travel or pure fictional science?"data-reacttid =" 83 "> Hotels in space – the ultimate frontier for luxury travel or pure fiction science?

<p class = "canvas-atom canvas-text Mb (1.0em) Mb (0) – sm Mt (0.8m) "Pugno said Nature Nano report [from the Tsinghua team] is a key step towards the solution … so never say never. "" Having a powerful mega-cable keeps its strength and tolerance for defects is the biggest challenge, "said Pugno. Nature Nano report [from the Tsinghua team] is a key step towards the solution … so never say ".

<p class = "canvas-atom canvas-text Mb (1.0e) Mb (0) – sm Mt (0.8e) Chinese scientists say they have the key to building a space elevator. O What? appeared for the first time South China Morning Post"data-reacttid =" 85 "> This article said Chinese scientists have the key to building a space elevator.

<p class = "canvas-atom canvas-text Mb (1.0em) Mb (0) – sm Mt (0.8e) South China Morning Post download us mobile application. Copyright 2018. "data-reactiontid =" 86 "> Download the latest South China Morning Post news from our mobile app.

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