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Share with friends and circles of friends with wechat scanning QR code < / P > < p > on August 21, following the failure of collecting Martian rock samples for the first time, NASA's perseverance rover is ready to go to a new location in the next few weeks for another attempt < p > it is reported that the first sampling of the Mars rover perseverance earlier this month was not completed as expected by the engineers. Engineers said the rover's sampling arm worked normally, but the sampling tube was empty < p > the engineer plans to control the rover to a new site called Citadelle for the second sampling test. To ensure that rock samples are collected, engineers will wait for the image of the sampling tube to be transmitted back to earth before loading it into the belly of the rover < p > < / P > < p > illustration: the shadow of self photographing when perseverance Rover sampled Martian rocks for the first time < / P > < p > "we were very excited at first. The sampling equipment could work normally from beginning to end without any failure. Then it turned out to be 'no sample?! What's the matter with no samples? '" Louise jandura, chief engineer in charge of sampling and storage of the Mars rover perseverance, said when talking about the first sampling of the rover on August 5“ So after realizing this, we quickly began to investigate. " < p > the rock drilled by the perseverance Rover sampling bit is not as strong as scientists think. The core sample, which was supposed to be quite hard, turned into fragile powder and slipped out of the sampling tube of the detector. After finding that the sampling tube was empty, the mission used the camera of the Mars rover perseverance to analyze the residues in the drilling hole. They believe that the dust pile around the hole and some materials at the bottom of the hole are the samples sliding out of the sampling tube < p > Jennifer Trosper, project manager of NASA Jet Propulsion Laboratory, wrote in a blog post on Thursday: "this stone is not the kind of stone we want at all."“ Although we have successfully obtained more than 100 cores in different tests on earth, we have not encountered such rocks in previous tests. " < p > the sampling arm of the Mars rover perseverance is 2.1 meters long and has five joints, which can detect the target rock from the front of the rover. At the end of the sampling arm is a "turret" the size of a shoebox, weighing up to 45 kg. The head of the sampling arm is equipped with a hollow bit called "rotary impact coring bit", which can drill into rock and temporarily store the material in the sampling pipe. These samples will be returned to the rover, processed by another tube, and then left somewhere on the Martian surface The drill bit first sampled by the Mars rover perseverance was used to collect core samples. Some of the nine bits carried by the Rover are more suitable for collecting weathered rock, which is the more fragile, mud like material that engineers accidentally encountered in their first attempt to sample The mission of the Mars rover perseverance is to collect up to 35 Martian rock samples, which NASA will bring back to earth in the 1930s. The rocks are stored in chalk sized tubes, which, if all goes well, will be the first primitive Martian sample captured and returned to earth. Perseverance will leave the tube that collected the sample somewhere on the Martian surface for future NASA robots to collect and launch into Mars orbit. Another spacecraft built by the European Space Agency will bring samples back to earth < p > NASA engineers spent nearly a decade designing and manufacturing the perseverance Rover sampling system. Adam steltzner, chief engineer of the rover, described it as "the most complex and sophisticated thing we know and make"（ Chen Chen) < / P > < p >

2023-03-22 10:04:41