嫦娥五号探测器成功发射
Chang'e-5, comprising an orbiter,a returner, a lander, and an ascender, with a total takeoff mass of 8.2 tonnes, is expected to accomplish unmanned rendezvous and docking in lunar orbit. After it enters the lunar orbit, the lander-ascender combination will separate from the orbiter-returner combination. While the orbiter-returner orbits about 200 km above the lunar surface, the lander-ascender will touch down on the northwest region of Oceanus Procellarum, also known as the Ocean of Storms, on the near side of the moon in early December. About 2 kg of samples are expected to be collected and sealed in a container in the spacecraft. Then the ascender will take off with the sample, and dock with the orbiter-returner in orbit. After the samples are transferred to the returner, the ascender will separate from the orbiter-returner. The combination of orbiter and returner will then depart the lunar orbit and return to Earth's orbit, where the pair will break up and the returner will conduct a host of complicated maneuvers to return to a preset landing site in North China's Inner Mongolia autonomous region in mid-December. The entire mission is scheduled to last about 23 days, according to the China National Space Administration. |