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2019年11月23日 04:26:00    日报  参与评论()人

荣昌区减肥医院哪家好璧山区冷冻点痣多少钱重庆附属医院治疗狐臭多少钱 All Eyes (and Ears) on Jupiter做好准备,近看木星极光!As NASA’s Juno spacecraft closes in for its Monday arrival at Jupiter, many other eyes are also staring at the solar system’s largest planet.美国宇航局(NASA)的“朱诺号”探测器将于周一抵达木星。随着这一天的临近,其他很多双眼睛也在盯着太阳系最大的行星木星。Data from about 25 observatories — including some of the largest on Earth, like the W. M. Keck Observatory in Hawaii, and in orbit around Earth, like the Hubble Space Telescope — will aid scientists in interpreting the data that Juno is expected to gather as it swoops close to the cloud tops of Jupiter over the next 20 months.接下来的20个月里,“朱诺号”预计会在从空中接近木星的表面云层时收集相关数据。来自大约25个观测点——包括地球上最大的一些天文台,如位于夏威夷的W·M·凯克天文台(W. M. Keck Observatory),以及绕地轨道上的望远镜,如哈勃太空望远镜(Hubble Space Telescope)——的数据,将协助科学家对“朱诺号”收集到的数据进行解读。An ultraviolet image of the auroras at Jupiter’s north pole in May superimposed on top of an 2014 image made by the Hubble Space Telescope.5月拍摄到的一幅木星北极的极光紫外图像,叠映在哈勃太空望远镜2014年拍摄的一幅图上。It has taken Juno nearly five years to reach this point in its journey.“朱诺号”用了近五年时间,才到达这个位置。“In just a few days, we’re about to arrive at Jupiter, and it’s hard to believe,” Scott Bolton, the mission’s principal investigator, said at a NASA news conference on Thursday.“几天后我们就要到达木星了,真是难以置信,”此次任务的首席研究员斯科特·尔顿(Scott Bolton)周四在NASA的新闻发布会上说。Around last Friday, Juno crossed from interplanetary space into the magnetic bubble surrounding Jupiter that deflects the stream of particles from the sun known as the solar wind. “Inside that magnetosphere is Jupiter’s domain that’s filled with its particles,” Dr. Bolton said. “It has blocked out the sun’s particles.”“朱诺号”于上周五前后穿过星际空间,进入包围木星的磁泡。磁泡使来自太阳的粒子流,即太阳风发生偏转。“那个磁力圈里便是木星的领地,充满了粒子,”尔顿说。“它挡住了太阳的粒子。”One of Juno’s instruments measures radio emissions from the charged particles, and those radio waves are easily converted into sound waves, which sharply changed in tone as the spacecraft crossed the “bow shock,” where Jupiter’s magnetic field plows through the solar wind.“朱诺号”携带的其中一台仪器,是用来测量带电粒子的无线电发射的。那些无线电波容易被转化成声波。探测器穿过“弓形激波”,即木星的磁场费力地穿过太阳风时形成的激波时,声波的音调发生巨变。“Just the sound of it can tell you it’s nontrivial to go into Jupiter,” Dr. Bolton said, as NASA released the recording of it.“单是它的声音就表明进入木星不简单,”尔顿在NASA公布录音时说。A couple of days ago, the propulsion system was pressurized in preparation for the firing of the spacecraft’s engine, which will take 35 minutes on Monday. On Thursday, the last set of instructions before the arrival was sent to Juno.几天前,为了准备探测器发动机在周一的点火,推进系统进行了加压。点火过程将需要35分钟。周四当天,抵达木星前的最后一组指令已被发送给“朱诺号”。“Then it’ll be hands-off from the team,” said Edward Hirst, the mission manager. “The spacecraft is on its own, and it’s designed to take care of itself.”“然后就没任务团队的事了,”任务主管爱德华·赫斯特(Edward Hirst)说。“探测器独自行动,设计时就考虑了它自行运转的能力。”When in orbit, Juno’s instruments will be able to peer deep into Jupiter, but only for a narrow swath. The faraway observations by telescopes will “fill in the blanks to get the big-picture story,” Leigh Fletcher, of the University of Leicester in England, said in an interview. “We’ll have the best observational data set of Jupiter that we’ve ever had.”进入轨道后,“朱诺号”上的仪器将能深入探测木星,不过只能看到一小片地区。英格兰莱斯特大学(University of Leicester)的利·弗莱彻(Leigh Fletcher)在接受采访时表示,望远镜的远距离观察“将填补空白,让我们有一个总体的了解。我们将获得有史以来最好的木星观测数据。”This week, Dr. Fletcher and his colleagues released infrared photographs of Jupiter seemingly on fire. “You can see the internal glow of Jupiter coming out,” Dr. Fletcher said. “Those clouds are colder and are absorbing in the infrared.”本周,弗莱彻士和同事公布了几张红外照片,照片上的木星像是着火了一样。“能看到从木星内部散发出来的光,”弗莱彻说。“那些云的温度要低一些,正在吸收红外线。”Once Juno begins orbiting Jupiter, each time that the spacecraft zips in close, the team will take similar photographs using the European Southern Observatory’s Very Large Telescope in Chile “to place the Juno close-up observations in their broader spatial context.”一旦“朱诺号”开始绕木星运转,探测器每次接近木星时,任务团队都会利用欧洲南方天文台(European Southern Observatory)设在智利的甚大望远镜(Very Large Telescope)拍摄类似的照片,“将‘朱诺号’的近距离观察置于更大范围的空间背景中。”For example, Dr. Fletcher said he wanted to piece together Juno’s measurements of ammonia and water — key constituents of Jupiter’s clouds — with the weather patterns seen in the Very Large Telescope pictures.比如,弗莱彻说他希望把甚大望远镜观测到的天气规律,和“朱诺号”测量到的氨和水——木星云层的关键成分——数据放在一起。With Juno providing the first good look at Jupiter’s poles, Dr. Fletcher is curious as to whether huge hurricane-like storms rage, similar to what has been observed in Saturn’s polar regions. The auroras — glowing patterns powered by charged particles slamming into the atmosphere — might also affect the weather.“朱诺号”将让人们首次有机会好好观察木星的两极。弗莱彻士想知道,是否会出现像飓风一样的暴风雨,就像在土星的两极地区观察到的那样。极光——带电粒子撞向大气层时产生的发光现象——可能也会影响天气。To gain more data on the auroras, the Hubble Space Telescope has been staring at Jupiter for 45 minutes every day for the past month. At Earth, auroras light up when solar wind particles slam into molecules of air near the polar regions. At Jupiter, the charged particles come mostly from a different source: the volcanos of Io. Jupiter’s powerful magnetic fields then accelerate the particles into the planet’s atmosphere.过去一个月里,为了获取更多有关极光的数据,哈勃太空望远镜每天都要盯着木星看45分钟。在地球上,当太阳风粒子与两极地区附近的大气中的分子相撞时,会发生极光现象。在木星上,带电粒子主要来自另一个来源:木卫一上面的火山。然后,木星强大的磁场促使粒子加速进入木星的大气层。At times, the auroras are subdued. At other times, they are “almost like fireworks going off in the ionosphere of Jupiter,” said Jonathan Nichols, a University of Leicester scientist who is leading the Hubble study.有时候,极光颇为柔和。但其他时候,它们“几乎像是木星电离层里燃放的烟花,”领导哈勃研究的莱斯特大学科学家乔纳森·尼克尔斯(Jonathan Nichols)说。One of the things that is unknown is how much the solar wind contributes to Jupiter’s auroras. “We’ll be working on that over the next few weeks and months,” Dr. Nichols said.迄今尚待解答的其中一个问题是,太阳风对木星极光的影响有多大。“我们将在接下来的几周和几个月里研究这个问题,”尼克尔斯说。On Earth, auroras appear over an area about as large as the ed States. Jupiter’s auroras, like everything else on Jupiter, are vastly larger, about as wide as five Earths.在地球上,能看到极光的地区在面积上大约和美国相当。木星的极光区,就像木星上的所有事物一样,都会大得多,大约相当于地球的五倍。“But we’ve never been able to get up close and really observe these processes,” Fran Bagenal, a professor of astrophysical and planetary sciences at the University of Colorado and one of the mission scientists, said at the news conference. “So we can then compare them with what we see at Earth, what we seen at Saturn.”“但我们一直无法接近并真正观察这些过程,”科罗拉多大学(University of Colorado)研究天体物理和行星科学的教授、参与“朱诺号”探测任务的科学家之一弗兰·巴格纳尔(Fran Bagenal)在新闻发布会上说。“因此,我们便能把它们和我们在地球和土星上看到的情况进行比较。”Dr. Bagenal said scientists were curious about whether Jovian auroras were simply larger versions of Earth’s auroras. “Or do we have to really go back to the fundamental physics and work out what’s really going on here?” she asked.巴格纳尔表示,科学家好奇木星上的极光是否只是放大版的地球极光。“还是说我们必须真的回到基础物理学,弄清楚它到底是怎么回事?”她问道。 /201607/453091On Nov. 21, Chinese electric carmaker NextEV unveiled its EP9 model at the Saatchi Gallery in London, along with its NIO brand and logo.11月21日,中国电动汽车制造商蔚来汽车在伦敦的萨奇艺术馆展出了其EP9车型以及其NIO品牌和标志。EP9 is reportedly the world#39;s fastest electric supercar, with the speediest lap time for an electric vehicle (EV) at the Nürbhurgring Nordschliefe test track in Germany, one of the most famous grounds for supercars around the world.据报道,EP9是世界上最快的电动超跑,其在世界上最有名的超跑赛道之一、德国纽格林北环赛道的测试赛道上刷新了电动汽车(EV)的最快圈速。The EP9 also beat the EV record at France#39;s Circuit Paul Ricard.此外,EP9也打破了法国保罗里卡尔赛道的EV记录。The first batch of NextEV cars will come onto the market in the next few months. In addition, the company has aly started research and development of its second model, tailored exclusively to the Chinese market.第一批蔚来汽车将在未来几个月内上市。此外,该公司已经开始研发专为中国市场定制的第二款车型。According to Li Bin, CEO of NextEV , the company will cooperate with other carmakers in China for production, rather than building new factories.据蔚来汽车的首席执行官李斌表示,该公司将与中国其他的汽车制造商合作生产,而不是建设新工厂。NextEV is often compared to Tesla. However, Li explained that Tesla is a product of the last generation of electric vehicles, while NextEV represents the new generation.蔚来汽车经常被拿来与特斯拉相比。不过李斌解释称,特斯拉是上一代电动汽车的产品,而蔚来汽车则代表的是新一代。He promised to present a whole new user experience in terms of both technology and human-car interaction.他承诺会在技术和人车交互方面提供全新的用户体验。In addition, he said that NextEV products will be much less expensive than Tesla vehicles, as NextEV is targeting consumers in a variety of first- and second-tier cities in China.此外他还表示,蔚来汽车的产品将比特斯拉汽车便宜得多,因为蔚来汽车针对的是中国一、二线城市的消费者。 /201612/482505重庆妇保医院大夫

重庆十院专家门诊重庆二院在周日有上班吗 20几岁怎样抗肌肤老化Jessica’s asking about aging: It seems to me that the best way to keep my skin looking great and wrinkle-free would be to prevent as much aging as possible, as opposed to trying to reverse the process when I’m older. Other than sunscreen, what kinds of products should I be using at this point (I’m 25) to keep my skin looking young?The Left Brain’s rejuvenating reply:This is a great beauty question and one that we see asked more and more. The proliferation of anti-aging products has gotten so extensive, you’d think cosmetic marketers want us all to revert to 3-year olds. And with some of the claims made, they certainly treat us like that is the age of our intelligence.The Anti-Aging Secrets for your SkinYou want to know what’s been proven to work? Here it is…Sun ProtectionFirst, protect your skin from the sun. This is the number one environmental cause of skin aging. Do this by minimizing your sun exposure and using sunscreen.Eat WellNext, eat a balanced diet. While everyone is different, this meta-review study on skin health and diet concluded that people who had higher intake of Vitamin C and linoleic acid and lower intakes of fats and carbohydrates had younger looking skin. You get linoleic acid by eating vegetables, fruits, nuts, grains and seeds.ExerciseFinally, exercise. Nothing keeps you looking and feeling young like regular exercise. Thousands of studies have shown that physical exercise is a highly effective way to treat all all signs of aging.Anti-aging TreatmentsMost scientists are skeptical of anti-aging treatments. This is because there is little published evidence from controlled clinical trials to show most anti-aging products have any benefit. You could say this is because private companies don’t want to make their research public, but if they did have meaningful, positive results you can be sure the PR arm of the company would crow about this where ever they could.We’ve seen previously that price is not indicative of the effectiveness of an anti-aging skin treatment. The conclusion was that none of the products were as effective as claimed.Does any treatment work?The only thing that scientists and reputable dermatologists agree on is that application of topical retinoids can repair sun damaged skin and prevent future collagen damage. Oh yeah, and they all say using sunscreen is a good thing.Beyond that, forget about it. Yes, that includes the Perricone Restorative Cream. Vitamin C works when you eat it, not when you slather it on your skin.Lasers for your skin?Recently, lasers and LEDs (Light Emitting Diodes) have been shown to effectively rejuvenate photoaged skin. Cosmetic surgeons have been making lots of money from these treatments and the big cosmetic manufacturers like Pamp;G and L’Oreal are trying to bring you this same treatment at home. But the technology isn’t quite y. Products you can buy right now like the Beurer Softlaser will likely disappoint.The Beauty Brains bottom lineScientists in the anti-aging field (who are not trying to sell you products) agree, anti-aging products are over-priced and under-deliver. For a 20-something, the best thing you can do is eat right, exercise and avoid long sun exposure. If you’re a bit older, start using skin products that contain vitamin A derivatives. They’re the only thing that has yet been proven to be effective. 杰西卡询问抗老化问题: 对我来说,保持我的肌肤细腻且没有皱纹的最好办法似乎是尽力抵抗老化,而不是去尝试着返老还童。除了防晒霜之外,在我这个年龄(我现在25岁)应该用什么产品来保持年轻肌肤呢?左脑对驻容的理性回答:这是个被越来越多的人所询问的重点美容问题。抗老化产品数量的剧增在各地已经十分广泛,你简直要认为化妆品商家们企图把我们都变回3岁。看看他们做的那些承诺,绝对是想把我们的智商变3岁。你肌肤抗老化的秘密你想要知道那些被实有用的方法吗?这里就是......防晒首先,你要避免太阳对皮肤的损害。这是自然环境作用于肌肤老化的第一天敌。尽量减少在太阳下暴露肌肤并且要使用防晒霜。良好的饮食其次,均衡饮食。尽管每个个体的情况不同,但是荟萃皮肤健康和饮食关系的案例研究表明:摄入较多的维他命C和亚油酸而且摄入较少的脂肪和碳水化合物的仍人更能够维持肌肤年轻。吃蔬菜,水果,坚果,谷物和种子能够补充亚油酸。运动最后,运动。没有什么比得上有规律的运动更能让你保持年轻和感受青春活力了。成千上万的研究表明运动身体是对付所有老化征兆的最有效的方式。抗老化治疗大多数的科学家都对抗老化治疗持质疑态度。这是因为临床试验被管制,大多数的抗老化产品是否有益就很少得到公开实。你可以认为这是因为私企不愿将研究结果公布于众,如果这些产品真的有重要或积极的作用,你想也想得到那些公司的公关部门早就得意洋洋得到处大肆宣扬。我们早前就已经洞察那些昂贵的价格并不暗示这些抗老化治疗是有效的。结论就是:没有任何此类产品是像其承诺般有效。那些治疗有用吗?科学家们和著名皮肤学者们唯一认同的是涂抹相关维甲酸可以修复受损肌肤,防止将要发生的胶原质受损.的确,他们都认为使用防晒霜是种好方法。除此之外的东西,正如95美元的抗衰老医生尼古拉的PERRICONE的修复乳液,就都别去理会了。维他命C只在你食用时才起效,而不是你将它厚厚地涂抹在皮肤的时候。皮肤激光治疗最近,雷射和LED(发光两级管灯)已显示能使干黄,粗糙起皱的皮肤恢复年轻。整形外科医生已从中获得暴利,化妆用品制造商巨头,例如保洁和欧莱雅正努力使您将这项务带回家享受。但是这项技术尚不成熟。你目前可以花钱享受的此产品就像beurer温柔疗法那样,很可能使你失望。最保险的美容密招研究抗老化的科学家们(他们不会说你去买产品)一致认为:抗老化产品标价过高而且效用不济。对于一个20几岁的年轻人来说,最好的抗老化就是正确地饮食,适当运动,避免阳光日晒。如果,你年龄稍长,可以开始食用含有维他命A衍生物的产品。他们是唯一一种已被实有效的药物。 /200803/31201城口县假体植入丰胸多少钱

永川区妇女医院激光祛痘多少钱 I’ve heard before that lack of sleep is connected with obesity, but I was surprised to hear that it also is linked to smoking, drinking alcohol and not being physically active. What’s the story here?Lack of sleep does appear to be associated with obesity - one theory is that sleep deprivation disrupts production of hormones that regulate appetite. But findings from a door-to-door government survey of 87,000 U.S. adults from 2004 through 2006 suggests that those who get the least sleep are also more likely to put their health at risk by smoking cigarettes, drinking too much alcohol, and not being physically active. In the case of cigarettes and physical inactivity, this was also true for those who slept nine or more hours per night.The study was conducted by the National Center for Health Statistics, an arm of the Centers for Disease Control and Prevention. It doesn't prove that sleep deprivation leads to smoking or alcohol consumption - or vice versa - and it doesn't tell us what other factors might influence these risky health habits. In some cases, depression or stress could be the underlying reasons for not getting enough sleep and for drinking.But the findings are striking. Here's a summary:*Smoking:Of those who slept seven to eight hours a night only 18 percent were smokers compared to 31 percent of those who slept less than six hours and 26 percent of those who slept more than nine hours.*Alcohol:Adults who got the least sleep were slightly more likely to have had five or more drinks in one day than those who got seven to eight hours, but here, the difference was only three percent: 19 percent of those who had a good night's sleep had five or more drinks a day compared to 22 percent of those who slept six hours or less.*Physical Inactivity:For both men and women regardless of age, those who slept less than six or more than nine hours a night were more likely to be physically inactive than those who slept seven to eight.*Obesity:The rate of obesity was highest (33 percent) among those who slept less than six hours and lowest (22 percent) among those who slept seven to eight hours a night. This held true for both men and women regardless of age.Adequate sleep is key to a healthy lifestyle, and accumulating research suggests that it plays an even larger role in health than we once thought. There is more to learn about this subject. I'll keep you posted on developments. Meanwhile, if you're not getting seven to eight hours sleep per night, based on what we now know, it might benefit your weight - and your overall health - to strive for more shut-eye.Andrew Weil, M.D.Read More 以前只听说睡眠不足与肥胖有关,但是令我惊讶的是它也与吸烟,酗酒和不参加身体锻炼有关.到底是怎么回事呢?睡眠不足与肥胖是有关的.一项理论说,睡眠可以减少胃液的分泌.但是根据美国政府的一项从2004到2006年间,上门访问87,000个成人的调查表明,睡眠不足的人和那些吸烟,酗酒,不参加锻炼的人一样,是将他们的健康推向危险的边缘,还有每天睡眠9小时或更长的人也是如此.这项研究是由国家卫生统计中心发表,这是一个疾病控制与预防中心的政府机构.其实,并没有明说睡眠的不足会导致吸烟和喝酒等,反之亦如此,而且也没有说明哪些因素可能会影响这些不好的习惯.一些例子表明,抑郁和紧张可能是由于没有足够的睡眠和良好的饮食.但是这些发现引起了争论,概括如下:吸烟:那些睡眠在7-8个小时之间的吸烟者有18%,少于6个小时的有31%,而26%的吸烟者的睡眠时间是多余9个小时的.喝酒:那些在白天喝五杯或是更多的成年人比那些睡眠时间在7-8个小时的人的睡眠时间只少一些,而它们之间相差为3%:那些在白天有五杯或是更多的,有19%的人表示睡眠良好,而22%的睡眠时间是6个小时或是更少.运动:部分年龄,不管是男性还是女性,那些睡眠时间少于6个小时或是多于9个小时的比那些睡眠时间在7-8个小时的人是少参加运动的.肥胖:肥胖在那些睡眠少于6个小时的人群当中占有最高的比例(33%),而在睡眠时间7-8个小时的人群中所占的比例是最小的(22%),不份年龄,这在男性和女性之间都是确实存在的.充足的睡眠是健康生活的关键,诸多事实告诉我们,它比我们过去所认为还要重要.想要了解更多的这个主题,我将会继续发表.同时,如果你每晚的睡眠是不足7-8个小时,请按我们所说的去做,这对你的体重是有好处的-还有你的健康-请尽量多闭眼吧. /200808/45867重庆市第四人民医院好吗?重庆涪陵中心医院做红色胎记手术多少钱

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光明典范城口县复合彩光祛斑多少钱
重庆星宸整形整形手术费多少钱
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开县祛斑多少钱好医优惠重庆医科大学附属儿童医院打溶脂针多少钱
美优惠重庆妇幼保健院做韩式隆鼻手术多少钱百度晚报
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