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Monday 2 April 2018

The Chinese Space Station Tiangong-1 Has Crashed in the Pacific.


Tiangong-1, whose name translates as "Heavenly Palace-1," launched without anyone aboard on Sept. 29, 2011. It settled into an orbit about 217 miles (350 kilometers) above Earth — a little lower than the International Space Station, whose average altitude is 250 miles (400 km).The 9.4-ton (8.5 metric tons) Tiangong-1 is about 34 feet long by 11 feet wide (10.4 by 3.4 meters) and features 530 cubic feet (15 cubic m) of habitable internal volume. 

Tiangong-1 consists of two components: a "resource module," which contains the space lab's solar-power and propulsion systems, and an "experimental module" that accommodated astronauts and scientific work. The experimental module features two beds and some exercise gear, but it doesn't have a bathroom or kitchen; these latter facilities were provided by the spacecraft that visited Tiangong-1. 
And other spacecraft did visit. That was the focus of Tiangong-1's successful mission, after all; the space lab was lofted primarily to test the docking and rendezvous technologies that China will need to build a bona fide space station in Earth orbit, which the nation plans to do by the early 2020s.

China's first-ever in-space docking  occurred in early November 2011, when a robotic craft called Shenzhou-8 visited the newly launched Tiangong-1. Two crewed missions to the space lab followed — Shenzhou-9 in June 2012 and Shenzhou-10 in June 2013. Both Shenzhou-9 and Shenzhou-10 had three crewmembers, and both missions lasted about two weeks

Tiangong-1 was designed to keep ticking for just two years, and the Shenzhou-10 visit marked the end of the space lab's operational life; China put it into "sleep mode" shortly thereafter. Originally, Chinese officials had said they planned to de-orbit Tiangong-1 in a controlled fashion, using the craft's thrusters to guide it into Earth's atmosphere. But in March 2016, China announced that Tiangong-1 had stopped sending data back to its handlers


In December 2017, China alerted the United Nations that Tiangong-1 would come down by late March 2018 but could not predict exactly when or where. On Monday, the country’s space agency confirmed it had crashed into the Pacific Ocean.
The China Manned Space Engineering Office said: “Through monitoring and analysis by Beijing Aerospace Control Centre and related agencies, Tiangong-1 re-entered the atmosphere at about 8.15am, 2 April, Beijing time (0115 GMT). The re-entry falling area is located in the central region of the south Pacific.






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