Design and Development
According to the China National Space Administration (CNSA), Tiangong-1 is an 8.5-metric-ton (19,000 lb) "space-laboratory module", capable of supporting the docking of manned and autonomous spacecraft. In 2008, the China Manned Space Engineering Office (CMSEO) released a brief description of Tiangong-1, along with its larger successor modules, Tiangong-2 and Tiangong-3. A model of the space station was revealed in the Chinese Lunar New Year celebration program on CCTV on 25 January 2009.
On 29 September 2008, Zhang Jianqi (张建启), vice-director of the CMSEO, declared in an interview with China Central Television (CCTV) that Tiangong-1 would be launched in 2010 or 2011. Xinhua later stated that Tiangong-1 would be launched in late 2010, and declared that the renovation of ground equipment was in progress. However, the launch did not ultimately take place until 2011.
By mid-2011, the construction of Tiangong-1 was complete, and its systems and thermal properties were undergoing testing. Testing was also conducted on the Long March 2F carrier rocket on which Tiangong-1 would be launched; technicians undertook particularly extensive safety tests on the rocket in August and September 2011, following the launch failure of a Long March 2C rocket on 18 August.
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