China is advancing its Tianwen 3 Mars sample return mission, which aims to bring approximately 500 grams (17.6 ounces) of Red Planet collectibles back to Earth in 2031. According to the China National Space Administration, the Tianwen 3 mission will have a lander, an ascender, a service capsule, an orbiter, and an Earth reentry module. If all goes as planned, Tianwen 3 will launch in 2028 on two Long March 5 heavy-lift rockets from the Wenchang Space Launch Site on Hainan Island, China’s southernmost province. Sputnik Moment “The Tianwen 3 mission is progressing smoothly and intensified efforts are being made to overcome technical challenges,” Hou Zengqian, the mission’s chief scientist, recently told Chinese state broadcaster CCTV. goals,” Hou added. You may like Meanwhile, NASA’s plans to transport samples from Mars to Earth are hazy at the moment. So China appears to be in the lead in achieving a major space milestone. “If accurate, this represents a Sputnik moment,” said former NASA “Mars czar” Scott Hubbard, referring to the reported progress of Tianwen 3. “Not only will China grab the headlines, it may be the first to find evidence of life on another planet,” he said. to Space.com Hubbard, who also previously led NASA’s Ames Research Center in Silicon Valley. Diagram of China’s Tianwen 3 Mars sample return mission (Image credit: University of Hong Kong/Zengqian Hou, et al.) Top scientific priority “The Tianwen 3 mission will search for microbial traces potentially similar to the first forms of life on Earth, while also taking into consideration the possibility of unknown life forms that may have arisen through it.” of Mars’ unique evolutionary history, providing crucial evidence to answer this important scientific question,” Hou told state news agency China to Mars will launch “around 2028” on two Long March 5 rockets that will depart from the Wenchang space launch site in China’s southernmost island province of Hainan (Launch windows for Mars missions occur only once every 26 months. The next one opens in November-December this year, and the next one, which Tianwen 3 is apparently targeting, runs from December 2028 to January 2028. 2029). Hou also said China hopes to finalize the landing site for the mission by the end of 2026, with Chinese specialists advancing work on a next-generation geological map of Mars in its entirety. If it goes as planned, the mission will collect samples from the Martian surface and then send them back to Earth around 2031. “Regardless of whether signs of life are found, the returned Martian samples will have irreplaceable scientific value,” Hou said. Challenges Hou added that analyzes of returned samples at microscopic, molecular and isotopic scales could deepen our understanding of the geology and environment of Mars, as well as the evolution of habitability and the conditions under which life can originate. Hou, Mars sample return is an extremely complex project, with landing site selection, planetary protection and pollution control, as well as identifying potential signs of life among its key challenges. candidates for the mission based on factors including geological age, history of water activity, habitability and potential to preserve biosignatures. Planetary Protection Laboratory two-way protection that will protect both the returning Martian samples and the Earth’s biosphere,” Xinhua reports. The laboratory’s tasks cover sterilization, unsealing, processing and biological risk assessment of the samples. “The facility is designed to support the implementation of important deep space missions and enable scientific research on Martian samples,” Xinhua added. China “will follow the planetary protection policies of the Space Research Committee, to prevent biological contamination of Mars by organisms and to protect the Earth from any possible extraterrestrial life forms that may be carried in the samples,” said Li Hang, director of DSEL’s development planning department, according to Xinhua. You can watch a video about China’s Mars sample return plans here.
