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تیانگونگ ۱، ایستگاه فضایی چین در اقیانوس آرام سقوط کرد.

تیانگونگ ۱، ایستگاه فضایی چین، سیزدهم فروردین حدود ساعت ۴:۴۵ بامداد به وقت ایران به اقیانوس آرام سقوط کرد. بیشتر قسمت‌های این مدارگرد حین سقوط در جو زمین متلاشی شد و سوخت.


Tiangong-1 (Chinese: 天宫一号; pinyin: Tiāngōng yīhào; literally: "Celestial Palace 1") was China's first prototype space station,—orbiting Earth September 2011–April 2018—serving as both a manned laboratory and an experimental testbed to demonstrate orbital rendezvous and docking capabilities during its two years of active operational life.<. Launched unmanned aboard a Long March 2F/G rocket on 29 September 2011, it was the first operational component of the Tiangong program, which aims to place a larger, modular station into orbit by 2023. Tiangong-1 was initially projected to be deorbited in 2013, to be replaced over the following decade by the larger Tiangong-2 and Tiangong-3 modules, but as of 31 March 2018 it was still aloft, though in a decaying orbit. It rentered Earth’s atmosphere early in the morning of 2 April 2018 in UTC.

 
Model of the Tiangong Space Lab and Shenzhou manned spacecraft.

Tiangong-1 was visited by a series of Shenzhou spacecraft during its two-year operational lifetime. The first of these, the unmanned Shenzhou 8, successfully docked with the module in November 2011, while the manned Shenzhou 9 mission docked in June 2012. A third and final mission to Tiangong-1, the manned Shenzhou 10, docked in June 2013. The manned missions to Tiangong-1 were notable for including China's first female astronauts, Liu Yang and Wang Yaping.

On 21 March 2016, after a lifespan extended by two years, the Space Engineering Office announced that Tiangong-1 had officially ended its service. They went on to state that the telemetry link with Tiangong-1 had been lost. A couple of months later, amateur satellite trackers watching Tiangong-1 found that China's space agency had lost control of the station. In September, after conceding they had lost control over the station, officials speculated that the station would re-enter and burn up in the atmosphere late in 2017.

According to Manned Space Engineering Office, as of 1 April 2018, Tiangong-1 was orbiting at an altitude of 104.1 miles (167.6 km), which corresponds to an orbital speed of 17,000 miles per hour (28,000 km/h). It is expected to deorbit between 1 April and 2 April 2018, although estimates vary and the precise re-entry is ultimately impossible to predict. The station will re-enter between 42.7°N and 42.7°S latitude, at an unknown longitude, although North America, Australia, Europe, northern South America, and southern Asia are excluded from recent forecasts.

According to Manned Space Engineering Office, as of 1 April 2018, Tiangong-1 was orbiting at an altitude of 104.1 miles (167.6 km), which corresponds to an orbital speed of 17,000 miles per hour (28,000 km/h) The station crashed into the South Pacific Ocean on 2 April 2018 at 00:15 UTC.

 

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