黄色网址免费看_精品一区二区免费视频视频_欧美69精品久久久久久不卡_污网站在线看_欧美阿v高清资源在线_男人日女人视频网站

China Focus: Chinese scientists intend to chase solar eclipse in space

Source: Xinhua| 2018-08-14 18:38:46|Editor: Yurou
Video PlayerClose

BEIJING, Aug. 14 (Xinhua) -- Total solar eclipses formed by the moon shadowing the sun are spectacular opportunities for scientists to observe the sun's corona, but too short and rare to capture.

So Chinese scientists have put forward a novel idea to view a total solar eclipse in space by using the earth to cover the sun, so they might have a longer and more accurate observation and study the source of solar storms.

NASA's Parker Solar Probe, the fastest spacecraft in history, blasted off on Sunday, on a mission to study the sun at a closer range than any other spacecraft. The probe is expected to enter the sun's fiery corona after a journey of about seven years.

Chinese scientists have proposed another approach: flying in the earth's shadow.

The corona -- the sun's rarefied gaseous envelope -- is more than a million degrees centigrade and often generates solar storms that damage satellites, navigation and communication systems, said Luo Bingxian, a researcher at the National Space Center of the Chinese Academy of Sciences (CAS).

"The heating process of the corona is one of astronomy's biggest mysteries, but our understanding of it is still lacking due to our inability to observe it," Luo said.

"It's very difficult to see the corona clearly from Earth, since its brightness is less than a millionth of that of the sun's disk," Luo said.

The corona is normally visible only during a total solar eclipse, when it is seen as an irregularly shaped glow around the darkened disk of the moon.

However, total solar eclipses are rare and usually last only minutes. Sometimes the best view is from the ocean or the weather conditions are poor, making them very difficult to observe.

Although scientists have devised a special instrument, the coronograph, to observe the corona, it's easily affected by factors such as stray light, vignetting and atmospheric scattering.

"Since we can see the moon between the sun and earth during a total solar eclipse, I thought we could put a telescope, the earth and sun in a straight line," said Luo.

His team calculated the best place for the telescope was close to the second Lagrange point (L2) of the sun-earth system, about 1.4 million kilometers from the earth.

There, the relative positions of the sun, earth and telescope would remain unchanged with the gravity of the sun, earth and a little propulsion, Luo said.

They still face challenges in technology, such as how to power the probe, since it must stay in the shadow of the earth and traditional solar panels would be useless.

"We are discussing different solutions, such as a radioisotope power source. Another possibility is to position a spacecraft with a solar sail in the sunlight and the probe in the earth's shadow, and connect them with a wire," Luo said.

"If our idea can be realized, our ability to observe the corona could help unravel the mystery of solar storms and forecast the space environment," he said.

"The prediction of solar eruptions is very important since they can damage satellites, power grids, submarine cables, petroleum pipelines, and aircraft, navigation and communication systems that are indispensable in the modern world," Luo said.

Cooperating with scientists from the University of Science and Technology of China and the Innovation Academy of Microsatellites of the CAS, Luo took the idea to a contest of innovative future technologies in Shenzhen, south China's Guangdong Province, recently and it was selected as one of 30 winning projects. The contest encouraged young Chinese scientists to conceive groundbreaking technologies and trigger innovation.

TOP STORIES
EDITOR’S CHOICE
MOST VIEWED
EXPLORE XINHUANET
010020070750000000000000011100001373897431
主站蜘蛛池模板: 婷婷久久综合九色综合97最多收藏|国产一级毛片久久|91精品二区|思思99精品视频在线观看|国产福利第一视频在线播放|人人澡超碰碰 | 国产亚洲精品一区二区三区|狠狠插综合网|把女人弄爽特黄=a大片3人|国产精品99久久久久久人免费|永夜星河免费在线观看|日日做=a爰片久久毛片=a片英语 | 亚洲综合中文网|www.=av免费观看|成人免费乱码大片=a毛片软件|男人操女人逼视频网站|国产精品99爱免费视频|蜜臀=av网址 | #NAME?|欧美暖暖视频|91国内在线|毛多水多www偷窥小便|人妻无码人妻有码中文字幕|少妇人妻精品一区二区三区 | 大内密探零零性在线|中文字幕无码免费久久|xxxxx中国少妇|男男调教小太正裸体|虎白女粉嫩尤物福利视频|成人一级免费 | 大胆L少妇BBBBBB流水|欧美操日韩|麻豆视传媒精品=aV|大地资源色婷婷视频在线|亚洲影视一区二区三区|成年男女免费视频在线观看不卡 | 国产人妖在线|国产午夜福利在线播放|亚洲国产成人精品久久久国产成人|高柳の肉嫁动漫在线播放|日韩久久精品一区二区三区|精品偷自拍另类在线观看 | 麻豆精品蜜桃|黄网wwwccc|色自拍偷拍|久久亚洲精品无码网站|国产成人免费视频在线网站2|久久久老熟女一区二区三区91 | 亚洲国产精品推荐|日韩欧美视频观看|国内老熟妇对白XXXXHD|亚洲综合精品香蕉久久网|国产男女免费完整视频网页|亚洲=av高清手机在线 | 在线观看国产免费|亚洲免费成人在线视频|日韩免费一级毛片|国产综合久久|爱情岛论坛亚洲品质自拍hd|欧美成人免费一区二区 | 欧美一区三区在线观看|中国黄色一及片|国产特黄色片|国产精华液一线二线三线|内射合集对白在线|日本免费无码XXXXX视频 | 天天超逼|综合一区二区三区|鲍鱼=av在线|农村黄色片|国产96精品|亚洲热线99精品视频 | 99视屏|亚洲精品日韩专区|欧美一级国产|久久丫不卡人妻内射中出|欧美日韩另类综合|亚洲色无码=a片中文字幕 | 亚洲综合另类小说色区色噜噜|国产奂费一级毛片|色七综合|草蹓视频在线观看|伊人欧美|精品成人一区二区三区免费视频 | 中文字幕人妻高清乱码|久久久无码人妻精品一区|国产精品第八页|国产美女被遭强高潮网站不再|石原莉奈无删减在线观看|欧美成年网站 | CHINESE熟女熟妇1乱|亚洲一区二区三区乱码=aⅴ蜜桃女|最新国产福利一区二区免费视频|爱豆传媒国产剧情|国産精品久久久久久久|超碰超碰在线 | 亚洲日韩精品欧美一区二区一|蜜桃视频在线视频|久久亚洲一区二区三区四区五区|国产女性无套免费看网站|97色久水蜜桃|日本中文字幕=a∨在线观看 | 亚洲精品久久久久久无码色欲四季|成年人黄色=av|麻豆精品久久久久久久综合|亚洲国产日韩欧美在线|国产传媒懂得|亚洲综合色婷婷七月丁香 | 男女草草草|国产精品成人久久|日韩成人激情|精品欧美国产一区二区三区不卡|草草網站影院白絲內射|国产免费又黄又爽又刺激蜜月=al | 人人精品久久|无码=aV潮喷|国产小视频国产精品|18深夜在线观看免费视频|好久被狂躁=a片视频无码免费视频|国产一级淫片=a免费播放鬼片 | 欧美G=aY男生露J自慰网站|亚洲国产一区二区三区日本久久久|成人久久|美女一级片视频|juli=a=ann无码丰满熟妇|亚洲特级黄色片 | 爆乳肉体大杂交SOE646在线|51vv社区视频在线视频观看|中文视频在线观看|国产网红=av|久久婷婷五月综合色奶水99啪|国产一级淫片免费 | 国产一级黄色网|亚洲欧洲一区|国产91传媒|成人网站在线进入爽爽爽|亚洲精品7777xxxx青睐|亚洲在线资源 | 热久久久久久|久久一级片|国产成人午夜高潮毛片|52色擼99热99re超碰|天堂在线一区|久久精品国产大片免费观看 | 中国女人FREEXXXXXXX|一色一伦一区二区三区的区别|亚洲αⅴ无码乱码在线观看性色|怡春院综合|精品人妻无码一区二区三区百度|国产精品wwwwww | 97成人超碰免|欧美综合视频在线观看|强被迫伦姧惨叫在线视频|亚洲=aV成人无码网站大全|91精选日韩综合永久入口|欧美精品一区二区三区高清=aⅴ | 国产成人毛片在线视频|视频在线播放|91福利在线看|国产亚洲无|天堂一区二区三区在线|日韩精品一卡 | 天海翼一区二区|黄色片高清视频|午夜激情一区二区|chinese激烈高潮hd|色精品国产|中文字幕视频网 | 亚洲综合中文网|www.=av免费观看|成人免费乱码大片=a毛片软件|男人操女人逼视频网站|国产精品99爱免费视频|蜜臀=av网址 | 广东少妇大战黑人34厘米视频|日韩午夜在线|国产=aⅴ激情无码久久久无码|精品人妻无码一区二区三区色欲|日本阿v天堂|亚洲视频在线播放 | 国产极品粉嫩馒头一线天=av|日韩在线观看|国产第一毛片|少妇又紧又粗又硬又爽视频|欧美人与动zozo|#NAME? | 国产精品大全|韩国精品视频一区二区在线播放|啦啦啦www日本高清免费观看|大柠檬导航香蕉导航巨人导航|中国黄色一级|国产成人一卡2卡3卡4卡 | 蜜臀=aⅴ精品一区二区三区|5c5c5c5c|午夜免费|四虎影视最新免费版|色噜噜狠狠狠狠色综合久|精品服丝袜无码视频一区|国产一区日韩一区 | 青青草网|chinese国语videos国产|久草99|久久久久亚洲=aV色欲=aV|青青草最新网址|一个色综合色 | 精品国产乱码久久久久久绯色|免费=av入口|色综合久久夜色精品国产=aV|国产青年男男GV|添逼视频|国产vr精品专区 | 在线看无码的免费网站|一本久道久久综合婷婷鲸鱼|九九爱在线视频观看免费视频|少妇久久久久久久久久|91视频免费网址|青青草自拍偷拍 | 99久久.com|久久大香香蕉国产拍国|俺去俺来也在线WWW色官网|#NAME?|伊人88|亚洲成人v | 中文字幕一级毛片|538精品视频在线|www亚洲|白丝=av片|网友自拍=av|男人边吻奶边挵进去视频 | 天天操天天爱天天干|日本中文字幕免费在线观看|国产精品久久毛片=a片软件爽爽|国产精品色=av|中文字幕第二十一页|日本护士大口吞精视频网站 | www.视频一区|韩国伦理片在线|无码熟妇人妻=av在线影片免费|亚洲入口|爽到憋不住潮喷大喷水视频|蜜桃视频www 色播六月天|色综合久久久久久久久久|国产精品久久久久不卡绿巨人|国产精品视频一区国模私拍|久久婷综合|精品麻豆剧传媒=av国产 日韩=a网|超碰=av在线|国产综合久|三级视频在线|久久精品毛片免费观看|护士精品一区二区三区99 | 伊人伊成久久人综合网|99久久精品无免国产免费|亚洲精选免费视频|自拍偷拍综合|欧美人禽交zozozo视频|久久久久女人精品毛片九一韩国 |