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Share with friends and circles of friends with wechat scanning QR code < / P > < p > on July 28, NASA announced on Wednesday local time that it plans to re plan the Mars sample return program (MSR), plans to add two Mars helicopters similar to the smart, and abandon the idea that it planned to use the European Space Agency's small Mars rover to transfer Mars samples and send them to the ascender NASA officials announced on Wednesday that they plan to redesign the mission. It is expected that in 2031, when the Mars sample return program lander lands on the surface of Mars, the Mars rover perseverance will still be in operation. NASA plans to let the Mars rover perseverance directly bring the collected samples to the ascent and send them to the Mars orbit. If the Mars rover perseverance fails to complete its mission at that time, two Mars helicopters similar to "wit" will pick up the sampling tube and send it to the vicinity of the riser < p > Richard cook, NASA's project manager in charge of the Mars sample return program, revealed that the two helicopters are similar to the "smart" in size and quality, but there are two key differences < p > cook explained, "the helicopter will have landing legs, including the bottom motorized wheel." This allows the helicopter to "cross the surface of Mars". If necessary, each helicopter will be equipped with a micro robot arm, which can pick up the sampling tube left by the Mars rover perseverance

if helicopters are ultimately needed to complete sampling, they will land near the sampling tube and pick it up, and then fly to the vicinity of the Mars Lander. After the helicopter stops, approach the lander and place the sample within the range of the transfer arm manufactured by the European Space Agency

the redesigned Mars sample return plan means that the European Space Agency will not land the rover on Mars. But NASA said the new plan could reduce the cost and complexity of the Mars sample return program

according to the original design, the Mars Lander designed by NASA will carry the Mars lander and the sample developed by the European Space Agency to the Martian surface. After landing, the sample was transferred to the rover to search and pick up the sampling tube, which was sent to the Mars Lander developed by NASA. Then, the ascent was launched into Mars orbit, docked with the sample return orbiter manufactured by the European Space Agency and returned to earth. In March this year, NASA asked the sample transfer Rover developed by the European Space Agency to land on Mars with another lander

David Parker, director of the European Space Agency's human and robot exploration program, said: "as an engineer, I am fascinated by the sample transfer rover, because its design speed is much faster than the previous Mars probe, and its travel speed on the surface of Mars may be 4 to 5 times that of the previous Mars rover."

but an additional Rover needs "two launches, two landings, and so on", which means that removing the Rover from the plan "has great procedural significance", Parker said

at present, the European Space Agency is still building a Mars rover called rosalynfranklin to land on Mars and look for signs of life. The rover was originally planned to be launched by a Russian rocket this year, but it failed to make it. The European Space Agency predicts that the rover rosalynfrank will lift off before 2028 < p > Parker said when talking about this situation: "the engineering team has been accelerating the progress of work, looking for an alternative to sending the Rosalyn Franklin Rover to Mars." He said the team was discussing different solutions

part of the revised Mars sample return plan is still being developed. NASA has not evaluated the specific cost, but they believe that the cost of using only one lander to go to Mars is much lower than launching two landers. Cook said that the two new helicopters have no clear main tasks, but can be used to observe the area around the Mars lander or observe the lander rockets taking off from Mars < p > Thomas Zurbuchen, deputy director of NASA's scientific mission Council, said that part of the inspiration for this new design came from the performance of other hardware on Mars, which was beyond imagination and had greatly exceeded the design life

curiosity, which provides ideas for the design of perseverance rover, is about to run on the surface of Mars for ten years. Originally designed to fly five times, the Mars helicopter wit has now flown 29 times over Mars

in recent months, there have been many changes in the Mars sample return plan. In May this year, NASA publicly solicited the environmental assessment opinions of this plan, and prepared to draft an environmental impact statement later in 2022

according to NASA's statement at that time, the independent review committee of the Mars sample return program previously said that the two landers "may improve the probability of mission success". NASA added a second lander to the mission in March this year, and now it has canceled it

however, the brief addition of the second lander delayed the launch date by two years to 2028, and the return of samples to earth was also postponed to 2031. After NASA updated the plan, the corresponding time did not change with the new mission plan NASA also announced that the Mars rover perseverance is collecting the 11th sample on Mars. This sample is a kind of fine-grained sedimentary rock. It was chosen because it is possible to preserve biological characteristics, which is the key to help scientists evaluate whether there was life on Mars. (Chenchen)

2023-03-22 10:04:54