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NASA spacecraft launched to mysterious and rare metal asteroid_我的网站

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一 | 11月21日，“北方韵瓷”——辽宁省第二届中青年陶瓷艺术家作品抚顺大官窑邀请展在辽宁美术馆拉开帷幕，此次展出的150多件艺术家作品和大官窑精品陶瓷，出自48位中青年陶瓷艺术家之手，进一步展现了辽宁陶瓷文化的传承与发展。　　抚顺大官窑始于辽，兴于金，盛于明清，毁于日本侵华战火。 CAPE CANAVERAL, Fla. -- NASA’s Psyche spacecraft rocketed away Friday on a six-year journey to a rare metal-covered asteroid.Most asteroids tend to be rocky or icy, and this is the first exploration of a metal world. Scientists believe it may be the battered remains of an early planet's core, and could shed light on the inaccessible centers of Earth and other rocky planets.SpaceX launched the spacecraft into an overcast midmorning sky from NASA’s Kennedy Space Center. Named for the asteroid it’s chasing, Psyche should reach the huge, potato-shaped object in 2029.“It's so thrilling,” said Laurie Leshin, director of NASA’s Jet Propulsion Laboratory. Added Arizona State University's Jim Bell, part of the Psyche team: “What a great ride so far.”An hour later, the spacecraft separated successfully from the rocket's upper stage and floated away, drawing applause from ground controllers.After decades of visiting faraway worlds of rock, ice and gas, NASA is psyched to pursue one coated in metal. Of the nine or so metal-rich asteroids discovered so far, Psyche is the biggest, orbiting the sun in the outer portion of the main asteroid belt between Mars and Jupiter alongside millions of other space rocks. It was discovered in 1852 and named after Greek mythology’s captivating goddess of the soul.“It’s long been humans’ dream to go to the metal core of our Earth. I mean, ask Jules Verne,” lead scientist Lindy Elkins-Tanton of Arizona State University said ahead of the launch. “The pressure is too high. The temperature is too high. The technology is impossible,” she said. “But there’s one way in our solar system that we can look at a metal core and that is by going to this asteroid.”Astronomers know from radar and other observations that the asteroid is big — about 144 miles (232 kilometers) across at its widest and 173 miles (280 kilometers) long. They believe it’s brimming with iron, nickel and other metals, and quite possibly silicates, with a dull, predominantly gray surface likely covered with fine metal grains from cosmic impacts.Otherwise, it’s a speck of light in the night sky, full of mystery until the spacecraft reaches it after traveling more than 2 billion miles (3.6 billion kilometers).Scientists envision spiky metal craters, huge metal cliffs and metal-encrusted eroded lava flows greenish-yellow from sulfur — “almost certain to be completely wrong,” according to Elkins-Tanton. It's also possible that trace amounts of gold, silver, platinum or iridium — iron-loving elements — could be dissolved in the asteroid's iron and nickel, she said. “There's a very good chance that it’s going to be outside of our imaginings, and that is my fondest hope," she said.Believed to be a planetary building block from the solar system’s formation 4.5 billion years ago, the asteroid can help answer such fundamental questions as how did life arise on Earth and what makes our planet habitable, according to Elkins-Tanton.On Earth, the planet's iron core is responsible for the magnetic field that shields our atmosphere and enables life.Led by Arizona State University on NASA’s behalf, the $1.2 billion mission will use a roundabout route to get to the asteroid. The van-size spacecraft with solar panels big enough to fill a tennis court will swoop past Mars for a gravity boost in 2026. Three years later, it will reach the asteroid and attempt to go into orbit around it, circling as high as 440 miles (700 kilometers) and as close as 47 miles (75 kilometers) until at least 2031.The spacecraft relies on solar electric propulsion, using xenon gas-fed thrusters and their gentle blue-glowing pulses. An experimental communication system is also along for the ride, using lasers instead of radio waves in an attempt to expand the flow of data from deep space to Earth. NASA expects the test to yield more than 10 times the amount of data, enough to transmit videos from the moon or Mars one day.The spacecraft should have soared a year ago, but was held up by delays in flight software testing attributed to poor management and other issues. The revised schedule added extra travel time. So instead of arriving at the asteroid in 2026 as originally planned, the spacecraft won’t get there until 2029.That’s the same year that another NASA spacecraft — the one that just returned asteroid samples to the Utah desert — will arrive at a different space rock as it buzzes Earth.___The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Science and Educational Media Group. The AP is solely responsible for all content.。2018年大官窑陶瓷被列为抚顺市非物质文化遗产项目。2020年抚顺大官窑陶瓷文创园建成，开启了大官窑陶瓷产业化发展新的篇章。　　展会现场，引来众多陶瓷文化的爱好者，在王永亮创作的“故宫系列”，蔡福全创作的“小怪涂鸦系列”，张桂昉创作的“鱼系列”，任嘉博创作的“冰凌花、天女木兰”等精品陶瓷前，观众们纷纷拿起手机拍照。　　“冰凌花、天女木兰系列陶瓷在网上展出后，吸引了大量粉丝，成为网红产品。”抚顺大官窑陶瓷制作技艺代表性传承人王永亮告诉记者：“抚顺大官窑是我国北方陶瓷发展史上的名窑，在《中国陶瓷史》中就有对大官窑的记载，其烧制的大官窑陶瓷釉色闪耀金属光泽，是北方结晶釉陶瓷的典型代表。” 　　据了解，王永亮在家族陶瓷工艺传承的基础上，通过实地考察，研读历史资料，走访民间陶瓷艺人，系统化整理出抚顺大官窑陶瓷原料采挖加工、成型制作、风格设计、烧成技术等全套工艺流程，有着800多年历史的抚顺大官窑陶瓷再次展现出夺目的光辉。　　“抚顺拥有丰富的高品质高岭土，是发展陶瓷产业的宝贵资源。”王永亮说。作为沈阳工学院创新创业学院陶瓷专业的负责人，王永亮将大官窑陶瓷制作技艺带进大学课堂，为大官窑陶瓷的传承培养了一批学子。目前，王永亮领衔的创作团队已获得十余项国际国内奖项，他们烧制的“大官窑雪山杯”被选为第三十一届世界大学生运动会“大运好礼”，还有更多的陶瓷文创产品在辽宁省博物馆销售。