【双语课件】嫦娥五号成功着陆,准备挖土!嫦娥五号知多少？

Chang’e 5 sets out to collect moon samples in landmark mission China launched a large robotic spacecraft early Tuesday morning at the Wenchang Space Launch Center in South China’s Hainan province, tasking it with landing on the moon and bringing back lunar samples, 44 years after the last time such extraterrestrial substances were brought back to Earth. A Long March 5 heavy-lift carrier rocket, the biggest and mightiest launch vehicle in China, lifted its 20-story-tall body and soared skyward trailing a spectacular silver flame at 4:30 am from its launch pad, leaving many spectators inside and around the coastal Wenchang center in awe and excitement as the gigantic booster thundered skyward.The rocket was tasked with placing the 8.2-metric ton Chang’e 5, which has four components — orbiter, lander, ascender and re-entry capsule — in an Earth-moon transfer trajectory. The heaviest and largest in the nation’s lunar probe fleet, Chang’e 5 will fly in the trajectory within the next several days and make some correction operations before conducting a key braking maneuver to avoid accidentally flying past the moon. After its arrival in lunar orbit, the probe will fly around the celestial body for a certain period of time and will then separate into two parts, with the orbiter and re-entry capsule remaining in orbit while the lander-ascender combination going down to the lunar surface.The landing combination will make an engine-assisted touchdown on the moon and later conduct such assignments as using a cutting-edge drill to obtain underground rocks from 2 meters beneath the surface and a mechanical arm to gather surface dirt.If everything proceeds smoothly, about 2 kilograms of stones and soil will be collected and packed in a vacuum metal container inside the ascender. After the two-day surface operations are done, the ascender’s rocket will elevate it to lunar orbit to rendezvous and dock with the re-entry module. It will transfer lunar samples to the module and then undock from the latter. The combination of orbiter and re-entry capsule will then depart the lunar orbit and return to Earth’s orbit, where the pair will break up and the re-entry capsule 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. Back on the lunar surface, the lander will continue using its three scientific payloads to carry out survey and measurement — the panoramic camera is tasked with mapping the topography of the landing site; the infrared spectrometer will determine the physical composition of stones and dirt around the landing site; and the soil measurement instrument will detect and analyze the subsurface structure of the drilling point. The entire mission is scheduled to last about 23 days, according to the China National Space Administration.