China launched the third and final module to complete its permanent space station, realizing a more than decade-long endeavor to maintain a constant crewed presence in orbit.
Chen Dong, Cai Xuzhe and Liu Yang arrived in early June for a six-month stay on board, during which they will complete the station’s assembly, conduct space walks and carry out additional experiments.
Mengtian weighs in at about 20 tons with a length of 17.9 meters , and a diameter of 4.2 meters . It will provide space for science experiments in zero gravity, an airlock for exposure to the vacuum of space, and a small robotic arm to support extravehicular payloads. The program is run by the ruling Communist Party’s military wing, the People’s Liberation Army, and has proceeded methodically and almost entirely without outside support. The U.S. excluded China from the International Space Station because of its military ties.Prior to launching the Tianhe module, China’s Manned Space Program launched a pair of single-module stations that it crewed briefly as test platforms.
With a lifespan of 10-15 years, Tiangong could one day find itself the only space station still running if the ISS adheres to its 30-year operating plan.
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