China's upcoming mission to bring Martian rock samples back to Earth could outpace efforts by NASA and the European Space Agency. NASA


December 14, 2024

China's ambitious Tianwen-3 mission could make it the first nation to successfully return samples from Mars to Earth. Scheduled to launch in 2028, the mission is expected to bring Martian rocks and soil back to Earth by 2031, nearly a decade ahead of NASA and the European Space Agency (ESA) in achieving this feat.
The plan for Tianwen-3 was detailed in a scientific paper published in November by researchers from China's Deep Space Exploration Laboratory and collaborating institutions. It outlines a comprehensive strategy involving a lander, an ascent vehicle, an orbiter, and a return module. Additionally, a helicopter and a six-legged robotic device may be used to collect samples from areas beyond the lander’s immediate vicinity.

Jizhong Liu, Tianwen-3's chief designer, confirmed in September that the mission is progressing on schedule. Researchers have identified 86 potential landing sites on Mars, primarily in the Chryse Planitia and Utopia Planitia regions. These areas were chosen for their relatively smooth terrain, which increases the chances of a safe landing, and for their potential to harbor preserved traces of ancient Martian life. These regions are believed to have sediments that could provide vital clues about Mars' past habitability.

The mission's primary objective is to search for evidence of past life on Mars. Collected samples will undergo detailed analysis, including mass spectrometry to identify their chemical composition and isotopic analysis to detect signs of biological activity. These methods could reveal whether Mars once supported life or had conditions suitable for it.

The Tianwen-3 mission’s timeline is particularly noteworthy as it outpaces NASA and ESA’s Mars Sample Return (MSR) mission, which has faced significant delays. NASA recently announced that its MSR mission, initially planned for the 2020s, is now pushed back to the 2030s, with sample return not expected until 2040. This gives China a considerable lead in this high-stakes space race.

China’s achievements in space exploration are already impressive. Its Chang’e-6 mission recently became the first to bring back samples from the moon’s far side. These samples provided groundbreaking evidence of volcanic activity on the lunar far side as recently as 2.8 billion years ago. Such advancements highlight China's growing expertise and ambition in space exploration.

If successful, Tianwen-3 would mark a significant milestone in humanity's quest to understand Mars and its history. The mission promises to expand our knowledge of the Red Planet and inspire future generations of explorers and scientists.

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