天问二号开启深空探测新征程

Group 1 - The Tianwen-2 mission aims to explore and collect samples from the asteroid 2016HO3 and subsequently study the main belt comet 311P, marking another significant exploration journey for China in space [2][3][5] - The mission is designed to overcome key technical challenges such as sampling from low-gravity celestial bodies, high-precision autonomous navigation, and small thrust trajectory design, providing valuable data for scientific research on asteroid origins and evolution [3][5][8] - The Tianwen-2 spacecraft is equipped with 11 scientific instruments, including medium-field color cameras and multi-spectral cameras, to facilitate the exploration of the asteroid and comet [7][9] Group 2 - The mission consists of 13 flight phases, including launch, asteroid transfer, close approach, and sample collection, with the first phase successfully completed [6][8] - The average diameter of asteroid 2016HO3 is approximately 41 meters, and it operates in a near-zero gravity environment, presenting significant challenges for the spacecraft to achieve stable attachment and sampling [8][9] - Future missions, Tianwen-3 and Tianwen-4, are planned for 2028 and 2030, respectively, with Tianwen-3 focusing on Mars sample return and Tianwen-4 targeting Jupiter and its moons [9]