Model of Tiangong space lab with attached Shenzhou crewed spacecraft.
Plan diagram of Tiangong-1 with solar panels extended
|Launch||29 September 2011,|
|Carrier rocket||Long March 2F/G|
|Launch pad||Jiuquan, LA-4/SLS-1|
|Reentry||2 April 2018, 00:16 UTC |
2 April 2018 00:15 UTC (China Manned Space Engineering Office)
|Length||10.4 metres (34 ft)|
|Diameter||3.35 metres (11.0 ft)|
|Pressurised volume||15 cubic metres (530 cu ft)|
|Days occupied||20 days, 18.5 hours|
(Hatch open to hatch closed)
|Literal meaning||Celestial Palace-1 or Heavenly Palace-1|
|Literal meaning||Target Vehicle|
Tiangong-1 (Chinese :天宫一号; pinyin :Tiāngōng yīhào; lit. 'Heaven's Palace 1" or "Celestial Palace 1') was China's first prototype space station. It orbited Earth from September 2011 to April 2018, serving as both a crewed laboratory and an experimental testbed to demonstrate orbital rendezvous and docking capabilities during its two years of active operational life.
Launched uncrewed aboard a Long March 2F/G rocketon 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 it orbited until 2 April 2018.
Tiangong-1 was visited by a series of Shenzhou spacecraft during its two-year operational lifetime. The first of these, the uncrewed Shenzhou 8, successfully docked with the module in November 2011,while the crewed Shenzhou 9 mission docked in June 2012. A third and final mission to Tiangong-1, the crewed Shenzhou 10, docked in June 2013. The crewed 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 China Manned 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 2016, 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 the China Manned Space Engineering Office, Tiangong-1 started reentry over the southern Pacific Ocean, northwest of Tahiti, on 2 April 2018 at 00:16 UTC.
The China National Space Administration (CNSA) designed Tiangong-1 as an 8,500 kilograms (18,700 lb) "space-laboratory module", capable of supporting the docking of crewed 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 (張建啟), 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 rocketdue to the recent launch failure of a Long March 2C rocket.
Tiangong-1 had a pressurised habitable volume of approximately 15 cubic metres (530 cu ft), and used passive APAS-type docking connectors. Structurally, Tiangong-1 was divided into two primary sections: a resource module, which mounted its solar panels and propulsion systems, and a larger, habitable experimental module.
Tiangong-1's experimental module was equipped with exercise gear and two sleep stations.The interior walls of the spacecraft had a two-color paint scheme – one color representative of the ground, and the other representative of the sky. This was intended to help the astronauts maintain their orientation in zero gravity. High-resolution interior cameras allowed crewed missions to be closely monitored from the ground, and the two sleep stations had individual lighting controls. Toilet facilities and cooking equipment for the crewed missions were provided by the docked Shenzhou (spacecraft), rather than being integrated into the Tiangong module itself. Similarly, one member of the module's three-person crew slept in the Shenzhou spacecraft, preventing overcrowding.
Tiangong-1 was originally intended to be launched in August 2011, and was delivered to the Jiuquan Satellite Launch Center on 23 July 2011, successfully passing a launch rehearsal test on 17 August 2011.However, following the failed launch of a Long March 2C rocket in August 2011, the launch was postponed. Following an investigation into the August 2011 launch failure, Tiangong-1's launch was rescheduled for late September 2011, partly to coincide with the Chinese National Day on 1 October.
On 20 September 2011, the spacecraft was again rolled out to Pad 1 of the South Launch Site at Jiuquan in preparation for the rescheduled launch attempt.The launch occurred at 13:16 UTC on 29 September 2011, successfully placing Tiangong-1 into low Earth orbit. Chinese television broadcast the launch animation accompanied by an instrumental version of the American patriotic song America the Beautiful , a choice of music for which it later offered no explanation.
On 30 September 2011, Tiangong-1 completed the second of two orbital transfer maneuvers, reaching an apogee altitude of 355 kilometres (221 mi). This was the precursor to a week-long program of orbital testing, conducted from the Beijing Aerospace Command and Control Center, to prepare the module for future orbital docking operations. On 10 October 2011, Tiangong-1 released its first orbital photo, showing a view of its outer hull and satellite relay antenna.
The uncrewed Shenzhou 8 mission successfully docked with Tiangong-1 on 2 November 2011 UTC, marking China's first orbital docking.Shenzhou 8 undocked from Tiangong-1 on 14 November 2011, before successfully completing a second rendezvous and docking, thus testing the reusability of the docking system. Shenzhou 8 deorbited on 17 November 2011, and landed intact in Siziwang Banner in Inner Mongolia. After the mission, the CNSA reported that Tiangong-1's systems were in optimal condition.
In December 2011, the Tiangong-1 module began automated internal checks for toxic gas, to ensure that its interior would be safe for astronauts to enter.In January 2012, reports emerged alleging that the American Boeing X-37B robotic spaceplane was shadowing Tiangong-1 for surveillance purposes. However, former United States Air Force orbital analyst Brian Weeden later refuted this claim, emphasizing that the X-37B occupied a different orbit from Tiangong-1, and would not be able to closely observe the module.
In March 2012, it was reported that China had finished the initial crew selection for the Shenzhou 9 mission. Niu Hongguang, the deputy chief commander of the China Manned Space Engineering Office, stated that Shenzhou 9 would dock with Tiangong-1 before August 2012.The Shenzhou 9 spacecraft was delivered to Jiuquan Satellite Launch Center for launch preparations on 9 April 2012, while its Long March 2F carrier rocket arrived a month later on 9 May 2012.
Shenzhou 9 launched successfully on 16 June 2012, carrying with it China's first female astronaut, Liu Yang.The spacecraft docked with Tiangong-1 on 18 June 2012 at 06:07 UTC (14:07 Beijing time). After about three hours, when the air pressures inside the two vessels were equalized, mission commander Jing Haipeng entered Tiangong-1. The first docking was entirely computer-controlled, without input from the three astronauts; a second, crew-guided docking was successfully conducted on 24 June 2012 at 12:42 Beijing time. Shenzhou 9 landed safely in Inner Mongolia on 29 June 2012. In August 2012, Shenzhou 9's crew travelled to Hong Kong to discuss their mission with university students.
The crewed Shenzhou 10 spacecraft, the final Shenzhou mission to rendezvous with Tiangong-1 before its deorbit, was launched on 11 June 2013.The launch of Shenzhou 10 was originally planned for earlier in the year, but was delayed to allow the mission to incorporate more complex scientific experiments. The mission's crew included China's second female astronaut, Wang Yaping. Shenzhou 10 docked successfully with Tiangong-1 on 13 June 2013.
On 15 June 2013, the Shenzhou 10 crew completed China's first orbital maintenance operation, replacing Tiangong-1's interior cladding.Additional maintenance work was conducted on the space station's seal rings. On 20 June 2013, Wang Yaping delivered a remote video lecture from orbit to students across China, demonstrating physics in microgravity with her colleagues. On 24 June 2013, CPC general secretary Xi Jinping contacted the astronauts via remote video link to congratulate them. After a series of successful docking tests, Shenzhou 10 undocked and returned safely to Earth on 26 June 2013. With a duration of 15 days, Shenzhou 10 was China's longest crewed space mission, until Shenzhou 11's 30-day mission to Tiangong-2 in 2016.
The Tiangong-1 was launched in September 2011, with an intended service span of two years. After the last crew departed the module in June 2013, it was put into sleep mode. It was intended that it would remain in orbit for some time, allowing China to collect data on the longevity of key components before being commanded to gradually re-enter the atmosphere. The Permanent mission of China to the United Nations (Vienna) informed the United Nations Committee on the Peaceful Uses of Outer Space that communication with Tiangong-1 had ceased functioning on 16 March 2016.One week later on 21 March 2016, the China Manned Space Engineering Office announced that they had officially disabled data service and ended the mission. According to the office, the space laboratory was under continued and close monitoring until it finally burned up in the Earth's atmosphere during an uncontrolled re-entry.
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The orbit of Tiangong-1 was decaying gradually, and the space laboratory was predicted to be destroyed upon re-entry into Earth's atmosphere.
At the request of China and the United Nations Office for Outer Space Affairs, the Inter-Agency Space Debris Coordination Committee (IADC), led by the European Space Agency (ESA), conducted an international campaign to monitor the re-entry of Tiangong-1. ESA's Space Debris Office in Darmstadt, Germany hosted and administered the campaign, with participation from other space agencies and organizations including the China National Space Administration (CNSA), the Indian Space Research Organisation (ISRO), the Japan Aerospace Exploration Agency (JAXA), the Korea Aerospace Research Institute (KARI), and Roscosmos of Russia.The IADC predicted that Tiangong-1 would break up during re-entry, but that parts of the station would survive and fall to the Earth's surface, potentially falling across an area thousands of kilometres long and tens of kilometres wide. However, because most of the re-entry area was ocean or uninhabited land, the IADC stated that the odds of a person being hit by falling debris to be "10 million times smaller than the yearly chance of being hit by lightning". The IADC's final prediction before re-entry was that Tiangong-1 would re-enter at around 01:00 UTC on 2 April 2018, plus or minus 2 hours, falling somewhere on Earth between 42.8° North and 42.8° South latitudes, with the most likely re-entry sites being at the north and south extremes of that range. This is because the station's high-inclination orbit had the smallest north-south speed at the extreme latitudes, and the greatest north-south speed near the Equator.
Independently, the non-profit Aerospace Corporation's Center for Orbital and Re-entry Debris Studies (CORDS) predicted that Tiangong-1 would most likely re-enter the atmosphere around 00:30 UTC on 2 April 2018, plus or minus 1.7 hours. CORDS scientists also predicted that it would re-enter somewhere between the 42.7° North and 42.7° South latitudes, a range that covered two-thirds of the Earth's surface, with a high likelihood of an ocean landing of whatever did not burn up during re-entry.They predicted that if any parts of the station survived re-entry, the small amount of debris would impact the ground over an area a few hundred square kilometers in size. The final prediction of likely areas for debris impact covered southern South America, Africa, the Middle East, and central Asia. However, even in those high-probability areas, they still estimated the odds of a specific person being hit by debris to be "about one million times smaller than the odds of winning the Powerball jackpot".
Tiangong-1 reentered the Earth's atmosphere at approximately 00:16 UTC on 2 April 2018 over the South Pacific Ocean at 3,600 kilometres (1,900 nmi) from Point Nemo, a location often used as a spacecraft cemetery to crash defunct satellites. As the spacecraft made an uncontrolled reentry, this was unintended coincidence.. According to Chinese state news agency Xinhua, the station mostly burnt up upon re-entry. A fisherman from the nearby island of Maupiti was able to witness the event. It was the largest spacecraft to re-enter the atmosphere since Fobos-Grunt in January 2012. This was about
|Altitude of Tiangong-1 (km)|
|20 March 2017||348.3||334.8||361.8||42.8|
|7 January 2018||281.3||265.1||297.4||42.77|
|14 March 2018||240.8||233.4||248.2||42.68|
|15 March 2018||239.5||232.5||246.5||42.67|
|16 March 2018||237.8||231.0||244.7||42.66|
|17 March 2018||235.9||229.3||242.6||42.66|
|18 March 2018||233.8||227.3||240.4||42.65|
|19 March 2018||231.8||225.4||238.2||42.65|
|20 March 2018||229.3||222.9||235.8||42.65|
|21 March 2018||227.0||220.3||233.6||42.64|
|22 March 2018||224.8||217.8||231.8||42.64|
|23 March 2018||222.4||215.1||229.6||42.64|
|24 March 2018||219.4||211.6||227.2||42.65|
|25 March 2018||216.2||208.1||224.3||42.65|
|26 March 2018||212.0||203.9||220.0||42.65|
|27 March 2018||207.7||199.2||216.3||42.66|
|28 March 2018||202.3||193.9||210.8||42.67|
|29 March 2018||196.4||188.5||204.3||42.67|
|30 March 2018||189.5||181.8||197.2||42.68|
|31 March 2018||179.0||171.8||186.2||42.69|
|1 April 2018||167.6||161.0||174.3||42.70|
|2 April 2018||132.75||130.9||134.6||42.70|
Tiangong-1 was designed as a test bed for key technologies later used on another test station called Tiangong-2, which was launched on 15 September 2016.Both experimental space stations are short-lived and meant to test technologies and systems for a permanent future space station called Chinese large modular space station, which is planned to be assembled from 2019 to 2022.
The design of Tianzhou, an automated cargo spacecraft intended to resupply the Chinese large modular space station, is based on Tiangong-1.
A space station, also known as an orbital station or an orbital space station, is a spacecraft capable of supporting a human crew in orbit for an extended period of time. It lacks major propulsion or landing systems. Stations must have docking ports to allow other spacecraft to dock to transfer crew and supplies.
Shenzhou is a spacecraft developed and operated by China using Soyuz technology to support its crewed spaceflight program. The name is variously translated as Divine vessel, Divine craft, or Divine ship. Its design resembles the Russian Soyuz spacecraft, but it is larger in size. The first launch was on 19 November 1999 and the first crewed launch was on 15 October 2003. In March 2005, an asteroid was named 8256 Shenzhou in honour of the spacecraft.
Soyuz is a series of spacecraft designed for the Soviet space program by the Korolev Design Bureau in the 1960s that remains in service today, having made more than 140 flights. The Soyuz succeeded the Voskhod spacecraft and was originally built as part of the Soviet crewed lunar programs. The Soyuz spacecraft is launched on a Soyuz rocket from the Baikonur Cosmodrome in Kazakhstan. After the retirement of the Space Shuttle in STS-135 (2011), the Soyuz served as the only means for Americans to make crewed space flights until the first flight of VSS Unity in 2018, and the only means for Americans to reach the International Space Station until the first flight of SpaceX Crew Dragon Demo 2 on 30 May 2020. The Soyuz is heavily used in the ISS programme.
Shenzhou 1 launched on 19 November 1999, was the first unmanned launch of the Shenzhou spacecraft. The spacecraft used was not equipped with a life support system or an emergency escape system. After orbiting the Earth 14 times, the command for retrofire was sent by the Yuan Wang 3 tracking ship off the coast of Namibia at 18:49 UTC. After a successful reentry it landed about 415 kilometres (258 mi) east of its launch pad and 110 kilometres (68 mi) north-west of Wuhai, Inner Mongolia.
Shenzhou 2 launched on January 9, 2001, was the second unmanned launch of the Shenzhou spacecraft. Inside the reentry capsule were a monkey, a dog and a rabbit in a test of the spaceship's life support systems. The reentry module separated from the rest of the spacecraft after just over seven days in orbit, with the orbital module staying in orbit for another 220 days.
Shenzhou 4 – launched on December 29, 2002 – was the fourth unmanned launch of the Chinese Shenzhou spacecraft. Two dummy astronauts were used to test the life support systems.
Jing Haipeng is a Chinese pilot and astronaut selected as part of the Shenzhou program. A fighter pilot in the People's Liberation Army Air Force, he was selected to be a CNSA astronaut in 1998. He is the first Chinese astronaut to have flown on three missions: Shenzhou 7, Shenzhou 9 and Shenzhou 11.
Tiangong is a space station program of the People's Republic of China, with the goal of creating a modular space station, comparable to Mir. This program is independent and unconnected to any other international space-active countries. The program began in 1992 as Project 921-2. As of January 2013, China moved forward on a large multiphase construction program that will lead to a large space station around 2020.
The Chinese large modular space station is a planned space station to be placed in Low Earth orbit. The planned Chinese Space Station will be roughly one-fifth the mass of the International Space Station and about the size of the decommissioned Russian Mir space station. The Chinese station is expected to have a mass between 80 and 100 tonnes. Operations will be controlled from the Beijing Aerospace Command and Control Center in China. The planned launch date of the core module, the Tianhe, is 2021. In 2017, the Chinese launched the Tianzhou-1 cargo spaceship, which is based on the Tiangong 1 and 2 space laboratories.
Shenzhou 8 was an uncrewed flight of China's Shenzhou program, launched on 31 October 2011 UTC, or 1 November 2011 in China, by a Long March 2F rocket which lifted off from the Jiuquan Satellite Launch Center.
Shenzhou 9 was the fourth crewed spacecraft flight of China's Shenzhou program, launched at 18:37:24 CST, 16 June 2012. Shenzhou 9 was the second spacecraft and first crewed spacecraft to dock with the Tiangong 1 space station, which took place on 18 June. The Shenzhou 9 spacecraft landed at 10:01:16 CST on 29 June in Inner Mongolia Autonomous Region. The mission's crew included the first Chinese female astronaut, Liu Yang. The next mission was Shenzhou 10, which launched on 11 June 2013.
Shenzhou 10 was a crewed spaceflight of China's Shenzhou program that was launched on 11 June 2013. It was China's fifth crewed space mission. The mission had a crew of three astronauts: Nie Haisheng, who was mission commander and previously flew on Shenzhou 6; Zhang Xiaoguang, a former PLAAF squadron commander who conducted the rendezvous and docking; and Wang Yaping, the second Chinese female astronaut. The Shenzhou spacecraft docked with the Tiangong-1 trial space laboratory module on 13 June, and the astronauts performed physical, technological, and scientific experiments while on board. Shenzhou 10 was the final mission to Tiangong 1 in this portion of the Tiangong program. On 26 June 2013, after a series of successful docking tests, Shenzhou 10 returned to Earth.
The Shenzhou program is a crewed spaceflight initiative by People's Republic of China. The program put the first Chinese citizen, Yang Liwei, into orbit on 15 October 2003.
Several Asian national space programs are engaged in a race to achieve the scientific and technological advancements necessary for regular spaceflight, as well as to reap the strategic and economic benefits of space capability. This is sometimes referred to as the "Asian space race" in popular media, an allusion to the Cold-War-era Space Race between the United States and the Soviet Union.
Tiangong-2 was a Chinese space laboratory and part of the Project 921-2 space station program. Tiangong-2 was launched on 15 September 2016. It was deorbited as planned on 19 July 2019.
Tiangong-3 was a proposed Chinese space station, part of the Tiangong space station program. The China National Space Agency was originally expected to launch Tiangong-3 around 2015, following the launch of the Tiangong-2 test laboratory, originally planned for 2013. The goals for the Tiangong-2 and Tiangong-3 laboratories were eventually merged, and the latter was therefore not ordered.
Colonel Wang Yaping is a Chinese military pilot and astronaut. Wang was the second female astronaut to be named by the CNSA, and the second Chinese woman in space.
The Tianhe, code name TH, or Core Cabin Module (CCM) is the foundation element of the Chinese space station, as the final stage of Project 921 Tiangong program, part of the Chinese space program. The CCM follows the Salyut and Almaz series, Cosmos 557, Skylab, Mir, ISS, Tiangong 1 and Tiangong 2 space stations. It is the first part of a third generation modular space station. Other examples of modular station projects include the Soviet/Russian Mir, Russian OPSEK, and the International Space Station. Operations will be controlled from the Beijing Aerospace Command and Control Center in the People's Republic of China. In 2018 fullscale mockup of CCM was publicly presented at China International Aviation & Aerospace Exhibition in Zhuhai. In October 2020, China selected 18 new astronauts ahead of space station construction to participate in the country’s upcoming space station project.
Shenzhou 11 was a crewed spaceflight of the Shenzhou program of China, launched on 17 October 2016 from the Jiuquan Satellite Launch Center. It was China's sixth crewed space mission, and its longest to date, at 33 days. Two days after launch, it docked with the Tiangong-2 space laboratory, which had been launched on September 15, 2016.
U.S. Strategic Command's (USSTRATCOM) Joint Force Space Component Command (JFSCC), through the Joint Space Operations Center (JSpOC), confirmed Tiangong-1 reentered the Earth's atmosphere over the southern Pacific Ocean at approximately 17:16 (PST) 1 April 2018.
China is ready to carry out a multiphase construction program that leads to a large space station around 2020. As a prelude to building that facility, China is set to loft the Tiangong-1 module this year as a platform to help master key rendezvous and docking technologies.
And once it gets down to plus or minus six hours, you can start ruling out continents.
The map below shows the relative probabilities of debris landing within a given region. Yellow indicates locations that have a higher probability while green indicates areas of lower probability. Blue areas have zero probability of debris reentry since Tiangong-1 does not fly over these areas (north of 42.7° N latitude or south of 42.7° S latitude). These zero probability areas constitute about a third of the total Earth's surface area.
China's Tiangong-1 space station has crashed in the Pacific Ocean, according to the country's space agency. The spacecraft re-entered the earth's atmosphere at 0015 UTC on Monday over the South Pacific and mostly burnt up on re-entry, state news agency Xinhua said.