China Chinese satellite could link world to Moon's dark side: space expert "> 宣化区| 容城| 文登| 和顺| 大渡口| 明光| 会同| 德安| 临城| 威远| 尼木| 广州| 黑河| 瑞昌| 斗门| 科尔沁右翼中旗| 镶黄旗| 佛坪| 当阳| 聂拉木| 平舆| 连州| 延长| 诏安| 韩城| 弥渡| 泉港| 金口河| 渭南| 博爱| 色达| 砀山| 黄山市| 肇州| 昌邑| 华蓥| 荆门| 迭部| 海伦| 石台| 龙湾| 灵川| 渭源| 吴江| 文昌| 临夏县| 中牟| 塔什库尔干| 集安| 阳东| 高县| 唐山| 洛阳| 孟村| 库尔勒| 泉港| 茶陵| 宁海| 白河| 科尔沁右翼前旗| 龙南| 文昌| 五华| 马鞍山| 金溪| 台山| 隆德| 新会| 方山| 筠连| 简阳| 即墨| 阜新蒙古族自治县| 梁平| 凤翔| 忻州| 葫芦岛| 福泉| 景宁| 建阳| 广宗| 湾里| 泗洪| 呼和浩特| 仁寿| 济南| 铁力| 福建| 磴口| 集美| 桦川| 巴马| 延川| 柯坪| 泾源| 大田| 错那| 惠山| 涿鹿| 崇信| 大化| 桐柏| 碌曲| 霞浦| 湟源| 沅江| 山西| 高州| 兴文| 石龙| 柳江| 将乐| 咸阳| 北京| 贵德| 怀化| 吉安县| 黑河| 武胜| 泰来| 兰考| 秀屿| 莒县| 门头沟| 昆山| 柳江| 广州| 鹰手营子矿区| 绥化| 汉中| 五原| 泽库| 黑龙江| 新竹市| 宾阳| 延安| 平江| 梁平| 钟山| 南通| 平湖| 松江| 应城| 蔡甸| 周宁| 通榆| 隆子| 丹棱| 文水| 左贡| 博山| 宁强| 青龙| 洛浦| 勐海| 盘山| 滨州| 六枝| 周口| 德安| 醴陵| 如皋| 平果| 沙县| 邹平| 阿拉善左旗| 郑州| 黎川| 南安| 二连浩特| 奉新| 富源| 长丰| 阳朔| 平湖| 昌黎| 潼关| 惠水| 南海镇| 永济| 平塘| 开江| 苍山| 秦安| 高阳| 神池| 阿拉尔| 晋州| 临漳| 新竹市| 磐安| 临安| 大丰| 松江| 怀集| 宝安| 黄梅| 新津| 彰武| 新县| 云安| 峡江| 内丘| 兴平| 惠山| 池州| 高淳| 建平| 乌拉特前旗| 石林| 和龙| 靖江| 吉水| 平山| 高陵| 广宁| 满城| 雁山| 古田| 白碱滩| 桂东| 孙吴| 甘南| 淇县| 泽库| 开远| 老河口| 维西| 潘集| 都匀| 睢县| 高唐| 钟祥| 墨玉| 泗水| 武平| 杨凌| 上海| 富顺| 阆中| 张湾镇| 友好| 八一镇| 汶上| 郁南| 诏安| 卫辉| 宁夏| 秀屿| 新沂| 九台| 杂多| 蔚县| 徽州| 景谷| 江川| 滨海| 浦江| 正安| 建水| 三原| 泸水| 察布查尔| 赣县|

彩票套餐多少钱一个月:

2018-11-20 04:48 来源:IT168

  彩票套餐多少钱一个月:

  《华尔街日报》的社论说,美中贸易逆差有很多原因。如果展示这些力量是为了在应对中国方面加强美国的地位,贸易专家们越来越担心,白宫的政策正在带来适得其反的后果:这些政策会疏远盟友,并有破坏让对中国有同样不满的国家采取集体行动的潜力,从而削弱美国在世界上的地位。

”  这句出自于《警世贤文勤奋篇》的古语,恰如其分地总结了米雪梅代表在艰苦困难环境中仍不忘奋斗努力的可贵品质,饱含着习近平对普通百姓的尊重与关怀。  十三届全国人大代表米雪梅,是千万来粤务工人员中的一名。

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  2016年前三季度,固定资产投资总量位居副省级城市第一,民间投资增长%,增速比全国高12个百分点,体现出广大企业家对成都十分看好。缅甸陆军准将伟林昨日表示,政府已提名仰光区首席部长敏瑞出任副总统。

中国舆论认为美国的声援,鼓动了争端国采强硬态度,目的是要以局势不稳为由,让美国军事重心重返亚太。

  特朗普宣布这一决定后,波音公司的股价22日下跌了5%,这体现了投资者对贸易战的担忧,因为中国还可以购买空客飞机。

  关于中美这场贸易战,侠客岛昨天推荐了郑永年教授的文章,他从宏观层面分析了近年来的中美关系,认为“中国威胁论”始终是以西方国家为主的国家群对华的一条外交主线。此次讲话中有多段是针对海外讲的。

  一位军方消息人士告诉路透社,仅剩的村庄被连夜拿下并控制住。

    “要慎独慎初慎微慎欲,培养和强化自我约束、自我控制的意识和能力”。瓜达尔港自贸区年底也将全面运营,并逐步成为南亚最大的中国-巴基斯坦商品集散地。

  一位军方消息人士告诉路透社,仅剩的村庄被连夜拿下并控制住。

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  由于这些设备对飞机的安全和操作至关重要,因此波音公司必须确保他们不会轻易失效。消息说:“计划在即将举行的会晤中重申,俄罗斯支持安南通过政治外交途径调解叙利亚危机的计划。

  

  彩票套餐多少钱一个月:

 
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Location: English -> China -> 
Chinese satellite could link world to Moon's dark side: space expert
BY 2018-11-20 07:22:16

BEIJING, June 18 (Xinhua) -- A satellite with a huge golden umbrella-shaped antenna is in an orbit more than 400,000 km from Earth, waiting for Chang'e-4, which is set to be the first ever probe to land softly on the Moon's far side.


The relay satellite for Chang'e-4 will establish a communication link between the Earth and the far side of the Moon, and might serve probes from other countries, contributing to international scientific exploration, said Ye Peijian, an academician of the Chinese Academy of Sciences and one of China's leading space experts.


The satellite, named Queqiao, or Magpie Bridge, was launched on May 21 and has entered the Halo orbit around the second Lagrangian (L2) point of the Earth-Moon system, where it can "see" both the Earth and the Moon's far side.


The Chang'e-4 probe, including a lander and a rover, is expected to be launched later this year. Its mission to explore the far side of the Moon was proposed by Ye, who has worked in China's lunar exploration program since Chang'e-1 more than 10 years ago.


Chang'e-4 follows on from Chang'e-3, which was launched at the end of 2013 and became the first Chinese spacecraft to soft-land on and explore an extraterrestrial object.


After Chang'e-3 accomplished its mission, China's space sector debated Chang'e-4's destination. Some were in favor of landing on the near side of the Moon again, because it's safer.


"I disagreed with that. Why should Chang'e-4 repeat what Chang'e-3 had done? We should not be afraid of failure in scientific exploration. We need innovation," Ye said.


He suggested sending the Chang'e-4 to the Moon's far side. This would be unprecedented and innovative.


He believed the United States and Soviet Union had wanted to do that in their lunar programs, but hadn't because of technological restrictions at the time.


Since the Moon's revolution cycle is the same as its rotation cycle, the same side always faces the Earth, and most of the other side is never seen from Earth. Landing and roving on the far side of the Moon require a relay satellite to transmit signals.


The first ever satellite operating on the Halo orbit around the L2 point, Queqiao used relatively small amounts of fuel during its journey to the planned orbit as it was under precise control. Its designed life is three years, but Ye said it might work for seven or eight years.


That means it could also provide communications for probes from other countries if they intend to explore the Moon's far side in the near future.


"That's the significance of going to the far side of the Moon. China will not only be the first to go there, but will also contribute to world scientific exploration," Ye said.


A reliable long-distance data transmission link is a key technological goal for space experts around the world. Queqiao carries an umbrella-shaped antenna with a diameter of 4.2 meters, the largest communication antenna ever used in deep space exploration.


The antenna was the central difficulty of the relay satellite, and took engineers a long time to develop, according to Ye.


Its name, Queqiao, was selected from more than 100 candidate names in a public naming contest.


In a Chinese folktale, magpies form a bridge to enable Zhi Nyu, a daughter of the Goddess of Heaven, to meet her beloved husband, cowherd Niu Lang, after they were separated by the Milky Way.


"We think the name is easy to understand, and it signifies the establishment of a bridge of communication," Ye said.


(Editor:Li Zhaoqi) (From:xinhua)
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