Most of the space laboratory was burned when reentering the Earth's atmosphere. And a small amount of space debris fell into a designated area in the South Pacific. Tiangong-2 was in orbit for more than 1,000 days after launching the Jiuquan Satellite Launch Center in September 2016 – much longer than its planned two-year lifespan.
30 astronauts were housed in this period Zhu Zongpeng, chief designer of the space laboratory at the Chinese Academy of Space Technology, Tiangong-2, was in good condition and could have remained in orbit for several more years.
However, it was decided to get the space laboratory "out of orbit" responsibly before it became too old.
Zhu told reporters, "Tiangong-2's voluntary resignation is designed to eliminate all risks.
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"Otherwise, the space laboratory's reliability will drop in orbit as the extended service extends longer than originally planned.
"Once anomalies occur, Tiangong-2 would uncontrollably fall back into the atmosphere, and some parts could not be completely burned. The debris would fall to the ground and pose a threat to humans. "
Tiangong-2 used a two-stage strategy for controlled orbit to ensure that the descent occurs at a specific time and location.
First, the space laboratory was lowered to an elliptical orbit of 200 km.
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And then it descended into an elliptical orbit of 43 miles (70 km) before it became fiery – entering through the atmosphere.
Tiangong-2's planned orbit distance is set after its predecessor Tiangong-1 lost power in April 2018 and crashed uncontrollably.
Actually, Tiangong-1 was to be decommissioned in 2013, but its mission was repeatedly extended until China lost communication with the spaceship 659004] READ MORE: Damned supermassive black holes in "Death Spiral"
Fortunately, debris from the damned spaceship, which moved at a speed of 27,000 km / h, fell into the ocean.
China is preparing to launch its third Tiangong-3 temporary orbital laboratory to test key technologies.
The country's ultimate goal is to launch a "real" space station in 2020, China will play a greater role in satellite space exploration, manned space exploration and space control.