首页 > 新闻 > 正文

卡萨布兰卡

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

我们相爱吧

A | 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.。提到读MBA，无论是新加坡还是欧美，第一步考虑到的往往是高分的托福和雅思要求。但考雅思并不一定一次就能刷过！大多数的人为了能拿到自己理想的成绩都需要二刷、三刷，有些甚至卡在了无限刷雅思的轮回中。况且准备雅思考试本身就是一个磨人的过程。前期的准备工作大约需要2个月甚至更长时间，360新币起跳的雅思费用也不便宜。对于英文水平好的人来说，为了读一门用英语授课的项目而专门去考雅思更是耗时又费钱。今年，新加坡知名学府PSB 学院与英国考文垂大学合作主办的MBA 项目打破了这一入学要求，扩大对英语要求的考量非需雅思或托福成绩！考文垂大学MBA项目该课程由英国考文垂大学提供，授课地点在新加坡，毕业后授予英国考文垂大学工商管理硕士学位证书和硕士研究生毕业证书，学历学位在中国及海外均被认可。英国考文垂大学拥有181年历史，是全球享有盛誉的高等学府之一。自2017年以来，考文垂大学连续7年荣获英国卓越教学（TEF）金奖。

B | 在2023年的《泰晤士高等教育》大学排名和英国青年大学排名中位列前25名。《2024QS星级大学评级》中获得最高荣誉被评为”QS五星院校"。新加坡PSB学院是新加坡最大的学院之一，拥有60年历史，在新加坡教育领域具有广泛影响力。课程设置考文垂大学提供的MBA研究生课程分别为两大方向：全球工商管理MBA（MBA Global Business）和金融MBA（MBA finance）。核心课程＋全球战略管理＋全球市场营销＋金融管理＋领导自我和全球文化的方法＋领导变革和包容性的方法由具有丰富管理实践经验的知名行业专家和资深学术讲师授课。相关阅读：集风趣幽默智慧于一身的PSB最受欢迎教师，就是他啦！全球校友今年是考文垂大学与 PSB 学院合作的十周年，毕业生已超过一万人。课程学员有来自世界各地的知名企业高管、创业团队精英、文化学者......国际化背景高，行业分布广泛。项目也凭借于此，为后续参与学员职业发展提供了重要助力，帮助他们在竞争激烈的职场中脱颖而出。报名详情该MBA项目在新加坡招生，英文授课，分为part-time和full-time，课程时长为12个月至20个月（根据学生个人情况）。

C | 入学时间分春、秋两季招生，分别在每年3月、7月、11月入学。目前，2024年11月项目招生仍在进行中！申请条件01新加坡公民、永久居民及持有长期入境签证者仅需满足学历和工作经验条件要求申请者的学历和工作经验必须符合以下其中一个条件：·相关学科的荣誉学士学位（至少2:2, 二等学位下级）；·拥有丰富的相关工作经验（5 年以上），并有持续专业发展的证据支持持续专业发展的证据；·持有其他学科学位的申请者；不符合上述入学要求的申请者，可通过额外的实践经验或其他非标准资格证书来申请，PSB 学院和考文垂大学根据具体情况进行评估。02非新加坡公民、永久居民及持有长期入境签证者除上述学历和工作经验条件要求外，申请人还需证明自身具有合格的英语水平通常情况下，雅思成绩需至少达到 6.5 分（其中任何部分均不得低于 5.5 分）或取得同等水平的英语语言测试成绩。项目费用为庆祝PSB成立60周年及PSB学院与考文垂大学合作10周年，今年入学的学生可享有校庆补贴，仅需支付1万5299新元的学费（原价2万8122新元）。学生具体申请情况请与招生老师联系，最终解释权来自于CU考文垂大学。