On Friday, July 19, China Yangong -2 ("Heavenly Palace") The site laboratory has successfully entered the Earth's atmosphere under controlled conditions and burned above the South Pacific Ocean. It was the successful completion of all of the work of Tianxiang-2, which constituted China's second attempt to test their ability to conduct research and human operations in Low Earth (Leo).
According to the China-Managed Space Agency, Yangong-2 entered the atmosphere at 21:06 Beijing time (6:06 pm; 9:06 pm EDT). While some debris fell into a "safe and secure sea-front in the South Pacific," most of the Laboratory burnt during the descent. In total, the station spent over 1,000 days in orbit, significantly exceeded the proposed 2-year lifespan, orbiting an average of 16,209 times.
Yangong -2 Launched in orbit on September 15, 2016, it has achieved some impressive features ever since. The included completes four successive dockings Shenzhou -11 Crew spaceship and the TianZhou-1 Cargo spaceship. During the many orbits of the earth, Yangong -2 Supports astronaut teams of two who live and work at the station for a period of 30 days.
The station has also been able to realize a number of key technological breakthroughs and completed a number of extended service tests. The achievements and those of his predecessor – Tangong -1 – Will lay the ground for the development, constructions, deployment and operations of China's third and final orbital laboratory, the Big Modular Space Station (LMSS).
The Astronaut Jing Haipeng, which spent its 50th anniversary on the TANGONG2 Oct 24, 2016:
"As the first to enter Tangong-2, I am pleased that the site lab has successfully completed its tasks, although I miss it, too, since it was our home site. My memory of the 30 days at Tiangong-2 with Chen Dong Still fresh, we conducted many scientific experiments such as rising silkworms and growing plants in space, China is stepping up efforts to prepare for the construction of the space station, and we are sure that a Space Station that belongs to the Chinese people will come soon. . ”
These 30 days in Tianjin -2 were the happiest and most unforgettable experience in my life
Unfortunately, it was time for the second "heavenly palace" to be brought back to Earth before it ceased operations and became a derelict space station. The University of China Academy of Space Technology, Zhu Chong, was the main designer of the Yangong -2. As he explained in a recent interview Xinhua:
"It is difficult to say goodbye to Tian-2, but when we consider reliability and safety-related factors, we need to move it from orbit to leave Tiangong-2 & # 39; To ensure the absolute certainty of his departure,
This decision is likely to be back in April 2018 by the re-entry of the Tianjin -1-station station, which occurred two years after it stopped operating. By comparison, the event has been something of an uncontrolled affair. Initially, the authorities have been concerned because it is not quite clear if the Chinese are still in control of the station.
When the descent is nearer, there was still anxiety about the date of the station's re-entry, where it would fall and how much debris would survive, which is all subject to a little bit of guesswork. Nevertheless, both Tangong-1 and his successor are now safely brought to the ground and the lessons learned from them will come in handy when the LMSS is operational.
The first module (The Core Cabin) is planned to be launched in orbit next year, while the other two (The Venta and Mengtian Laboratory) are slated to be launched in 2021 and 2022 respectively. Along with three docking ports, an avenue of hatches and multiple solar arrays, the vane hopes to have the entire space station assembled by 2022.
Since the International Space Station (ISS) is due to retire in 2024, that means China will be the only nation with an orbiting space station at that time. The LMSS will be much smaller, measuring about the same size as the currently retired Russia Me Space Station. There will also be about 1/5 of the load of the ICE, which weighs 400 metric tons (441 tons).
All of this serves to highlight the achievements of the Chinese site program, which was still a "three-step strategy" of development for the last 20 years. At the time, China had sent 11 spacecraft, two Space Labs, and sent 14 astronauts in space, bringing them home safely.
In the coming years and decades, China will send many more robotic missions to the site and even hope to conduct crew missions to the moon. It is also hoped that China will join space agencies like NASA, Roskosmos, the ESA ISRO to such projects as the International Moon Village and other major site ventures.
Read more: phys.org, Xinhua, CMSA