Use wechat to scan the QR code < / P > < p > to share with friends and circle of friends < / P > < p > according to foreign media reports, on Thursday, local time, < a target = "_ blank" href=" https://news.163.com/news/search?keyword=%E7%BE%8E%E5%9B%BD%E5%AE%87%E8%88%AA%E5%B1%80 "> NASA has confirmed that its perseverance probe has successfully landed at < a target ="_ blank" href=" https://news.163.com/news/search?keyword=%E7%81%AB%E6%98%9F "> Mars < / a > is the fifth successful Mars lander of the agency. < / P > < p > < / P > < p > the mission control center of NASA's Jet Propulsion Laboratory claimed that "< a target ="_ blank" href=" https://news.163.com/news/search?keyword=%E7%9D%80%E9%99%86 "> landing < / a > confirmed, willpower landed safely on the surface of Mars, ready to start looking for traces of life." The rover, NASA's most advanced probe to Mars, is expected to explore the surface of Mars in two years (687 days). NASA spent about $2.4 billion to build and launch willpower, and another $300 million to land and operate on Mars. < p > < p > the willpower is about the same size as a car and weighs about 1 ton. The manipulator at the end of the manipulator is equipped with a camera, a chemical analyzer and a rock drill. Willpower is nuclear powered and powered by a plutonium generator from the U.S. Department of energy. Willpower is designed based on its predecessor curiosity, and many companies provide parts for it, such as Lockheed Martin manufacturing heat shield, Aerojet Rocketdyne manufacturing rocket thruster, maxar technologies manufacturing mechanical arm, etc. Perseverance landed in the Jezero crater, about 45 kilometers wide in the northern hemisphere of Mars. NASA believes that this place used to be rich in water resources, and hopes that the ancient river delta can preserve organic molecules and other potential signs of microbial life, and perseverance will try to detect these signs with its instruments. Novel coronavirus pneumonia is also a memorial card for

, in addition to scientific instruments. The rover also used templates to carve the names of 10.9 million people on three silicon wafers, on which the Morse code said "let's explore the infinite space together.". < p > < p > the willpower has a sample buffer system with nine different drills and multiple sample collection tubes, which can capture the debris on the surface of Mars and eventually send them back to < a target = "at some time in the future_ blank" href=" https://news.163.com/news/search?keyword=%E5%9C%B0%E7%90%83 "> Earth < / a >. The rover is designed to cover more space than any previous probe. NASA estimates that willpower will travel an average of 650 feet (198 meters) a day, close to the longest distance NASA opportunity has ever traveled (702 feet). The willpower is also equipped with a small helicopter called originality, and NASA plans to try its first flight on another planet. NASA described it as the "Wright brothers moment" on Mars. (small) < / P > < p > < b > related reading: < / b > < / P > < p > < / P > < p > < b > the U.S. "Willy" Mars rover landed on Mars in 7 minutes < / b > < / P > < p > source: surging news < / P > < p > on February 18 local time, the U.S. "Willy" Mars rover landed on Mars in 7 minutes. Short time is the most difficult point of this landing. Due to the lack of time to return the data, "willpower" was unable to obtain ground support, and the landing was completed by independent judgment. At 4:55 a.m. Beijing time on February 19, the willpower rover in the Mars 2020 mission successfully landed on Mars after more than six months of flight The jezerro crater on the surface of Mars has officially opened its exploration journey. Although the U.S. willpower rover is the last probe to arrive on Mars in this year's Three Kingdoms of Mars (UAE, China and the United States), it is the first spacecraft to land on the surface of Mars. It is also the fifth Mars rover sent to Mars by the United States and the most complex one so far. So, what is the main mission of the willpower Mars rover this time? What are its characteristics? < / P > < p > < strong > the landing method is similar to that of curiosity < / strong > < / P > < p > as the absolute protagonist of NASA's $2.7 billion Mars 2020 mission, the landing method of willpower Mars rover is the same as that of curiosity Mars rover in August 2012, including parachute, spacecraft and a method called "Sky Crane". < p > < p > "perseverance" landing on Mars animation demonstration (01:50) < / P > < p > scientists celebrate "perseverance" after landing the first picture of Mars (00:25) < / P > < p > "perseverance" after landing the second picture of Mars < / P > < p > in the last few seconds before landing, with a rocket thrust suspended overhead, the rover hanging on the ground. The invention of this landing system enables people to land a very large and heavy probe on the surface of Mars. < / P > < p > of course, the "willpower" does not completely follow the landing technology of "curiosity", but adopts some new technologies, which can achieve higher navigation accuracy and richer data return. < / P > < p > for this reason, the scientific research team of "willpower" adopted a new method to make it land as close as possible to the target area. This technology, called "range trigger", can reduce the size of the intended oval landing area by more than 50%. < / P > < p > "range trigger" technology is the key to choose the right time to release the parachute of the descending aircraft. In the early missions, the probe would slow down in the Martian atmosphere and open its parachute as soon as it reached the expected speed. Willpower, on the other hand, will parachute according to the distance of the probe from its intended landing position. If the detector may miss the target area, it is necessary to open the parachute in advance; if it may not reach the target area, it is necessary to open the parachute after making a mistake. < / P > < p > the terrain relative navigation technology is similar to the landing navigation technology used by China's chang'e-4 probe. "Perseverance" is especially suitable for complex terrain, steep slopes and large rocks, more dangerous places. < / P > < p > the jezerro crater where willpower landed is an obvious delta alluvial fan. Billions of years ago, Mars was still warm and humid. It used to be a land of water. If there has been life on Mars, this is one of the most promising places to find traces of life.

它的工作原理很容易解释：首先是绕?
2023-03-22 10:04:28