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苹果已经建立了一个独立的网站专门销售新的iPad Pro。_我的网站

一 |     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.。最近，苹果的ipad pro 2018登陆了苹果的独立促销网站。促销界面的产品实物图片下有四个互动标签。并将新产品的特点概括为四个方面：屏幕尺寸、人脸识别、稀释剂和苹果铅笔。有趣的是，新iPad Pro独立宣传站的第一个屏幕是一个旧的iPad Pro。用户将遵循广告指导原则，从旧的iPad Pro开始引入新的iPad Pro。

二 | 在屏幕尺寸页面上了解新iPad Pro的屏幕尺寸。

三 | 点击“稀释剂”标签可以触发旋转动画，更立体地感知新iPad Pro的整体尺寸和体积。点击“苹果铅笔”标签和幻灯片，体验第二代苹果铅笔的磁充电功能。点击屏幕右上角的“了解更多”按钮，进入苹果官方的iPad Pro页面，找出购买平板电脑的地点。去年9月，苹果为iphone xs和iphone xs max创建了一个类似的专用页面，现在他们也在为2018年ipad pro做同样的工作，以激发更多用户的兴趣。苹果可能会把重点放在首次购买iPad的人身上，其中一些人甚至可能没有台式机或笔记本电脑。苹果首席设计师Jonathan Eve认为，iPadPro 2018是一款“非常独特和完整”的产品，在“99%的其他复杂技术产品”中脱颖而出。iPad Pro的图形设计也是一项成就，第二代苹果铅笔贴在iPad Pro侧面的方式就是其魅力的一个例子。

四 | 这些看似简单的变化是“最难做的事情”。由于苹果最新的A12X仿生芯片，iPad Pro的性能非常强大，苹果正试图将其定位为笔记本电脑的替代品，但这一计划遭到了一些反对。他们指出iOS12仍然缺乏一个开放的文件系统。此外，你还得花点时间了解哪些USB-C配件与它兼容。

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