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



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<p class = "canvas-atam canvas-text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content = "Chinese scientists have developed a carbon nanotube fiber they say it is strong enough to be used to build a space elevator. The Tsinghua University research team patented the technology and published part of their research in the magazine Natural Nanotechnology earlier this year. Chinese scientists have developed a carbon nanotube fiber that they say is strong enough to build a space elevator. The team of researchers at Tsinghua University has patented the technology and published part of their research the newspaper Natural Nanotechnology earlier this year.

They said fiber would be "in great demand in many cutting-edge fields such as sports equipment, ballistic armor, aeronautics, astronautics and even space lifts." But is it an elevator that could travel from Earth to space really possible, or is it just the stuff of science fiction?

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

<p class = "canvas-atomo canvas-text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content = "" Although generations of research have made the rocket more reliable already invented … space vehicles are still grossly inefficient, "wrote science fiction author Sir Arthur C Clarke in The Fountains of Paradise in 1979. "Although generations of research have made the rocket the most reliable form of propulsion ever invented … space vehicles are still grossly inefficient," wrote Sir Arthur C Clarke, author of fiction scientific basis. The Fountains of Paradise in 1979.

The novel was the first popular account of an idea described by the Russian scientist Konstantin Tsiolkovsky in 1895: the space elevator, a transport system from the planet to space, as well as the elevators we use every day, but 300,000 times larger.

The appeal of a space elevator boils down to potentially finding a much cheaper way of traveling into 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 it to less than $ 2 million per person per trip.

<h4 class = "canvas-atom screen 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 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 Earth's diameter – it will be stretched and straightened by gravity and centrifugal force.

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

Japan launched two satellites in September in the first experiment to study the movement of elevators in space, involving a mini-elevator traveling along a cable from one satellite to another. You still have to report the results. China also conducted space-sharing tests, but did not disclose the details.

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

Rocket scientist Tsiolkovsky established the concept in 1895, predicting a celestial castle in space trapped to Earth by a huge tower. Russian engineer Yuri Artsutanov went further, developing a modern version of a space elevator based on Tsiolkovsky's model.

American engineer and space scientist Jerome Pearson published the first technical article on the concept in 1975 that gained attention among the scientific community. Four years later, science fiction writer Clarke popularized the idea, drawing on Pearson's design in his novel about the space elevator.

Since then, scientists have tried to tweak the design and develop new materials to bring the concept closer to being a reality.

<h3 class = "canvas-atom screen text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content = "Who needs streetlights? Chinese city plans false moon"The Chinese city plans the false moon"

<h4 class = "canvas-atom screen 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 buckling, dynamic stability and strength. Scientists believe they can control buckling and dynamic stability with the help of a satellite, in geostationary orbit at the right altitude, to ensure the cable is not drawn by Earth's gravity or flies away.

But the problem of force still needs to be resolved because a space elevator would need a material strong enough to withstand the enormous weight and tension involved.

<p class = "canvas-atom screen text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content = "" Resistance requirements are extremely demanding, but A required strength-to-weight ratio is theoretically available on soft graphite crystals, "Pearson wrote in his Acta Astronautica. "Resistance requirements are extremely demanding, but the required strength-to-weight ratio is theoretically available on soft graphite crystals," Pearson wrote in his article published in the journal. Acta Astronautica.

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

Nicola Pugno, professor of solid structural mechanics at the University of Trento in Italy, said the new fiber of Chinese researchers is promising.

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

<p class = "canvas-atom screen text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content = "" Have a strong mega cable and keep your strength and tolerance to failure is the biggest challenge, "Pugno said. Nature nano report [from the Tsinghua team] is a fundamental step in the solution … never say never. "" Having a strong mega cable and maintaining its strength and fault tolerance is the biggest challenge, "Pugno said. Nature nano report [from the Tsinghua team] is a key step to the solution … never say never ".

<p class = "canvas-atom screen text Mb (1.0em) Mb (0) – sm mt (0.8em) – sm" type = "text" content = "This article Chinese scientists say they have the key to building a space elevator. One what? appeared for the first time in South China Morning Post"This article first appeared in the South China Morning Post" This article Chinese scientists say they have the key to building a space elevator.

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