1. <sub id="zy88n"></sub>
        1. <blockquote id="zy88n"></blockquote>
          欧美黑人又大又粗xxxxx,人人爽久久久噜人人看,扒开双腿吃奶呻吟做受视频,中国少妇人妻xxxxx,2021国产在线视频,日韩福利片午夜免费观着,特黄aaaaaaa片免费视频,亚洲综合日韩av在线

          NASA's Mars 2020 mission conducts flight test for Mars touchdown

          Source: Xinhua| 2019-05-25 16:52:21|Editor: Shi Yinglun
          Video PlayerClose

          LOS ANGELES, May 24 (Xinhua) -- NASA's Mars 2020 mission team has carried out a flight test of the Lander Vision System (LVS), which will help guide NASA's next Mars mission to a safe touchdown on the Red Planet, NASA said in a release on Friday.

          An Airbus helicopter carried an engineering model of the LVS on the test flight in Death Valley, California. During the flight, the helicopter (which is not part of the mission and was used just for testing) and its two-person crew flew a pre-planned sequence of maneuvers while LVS collected and analyzed imagery of the barren, mountainous terrain below.

          LVS is an integral part of a guidance system called Terrain-Relative Navigation that will steer the Mars 2020 rover away from hazardous areas during its final descent to Jezero Crater of the Red Planet on Feb. 18, 2021, according to NASA.

          "Current flight test of the Mars 2020 Lander Vision System will help enable safe landing in more scientifically interesting places in space, including future human exploration of the Moon and Mars," NASA's Jet Propulsion Laboratory tweeted.

          Mars 2020 will be the first spacecraft in the history of planetary exploration with the ability to accurately retarget its point of touchdown during the landing sequence.

          The rover carries a sample-caching system that will collect samples of Martian rock and soil, and store them on the surface of the planet for retrieval and return to Earth by subsequent missions, according to NASA.

          Mars 2020 is scheduled to launch from Cape Canaveral Air Force Station in Florida in July of 2020.

          TOP STORIES
          EDITOR’S CHOICE
          MOST VIEWED
          EXPLORE XINHUANET
          010020070750000000000000011100001380887851
          主站蜘蛛池模板: 午夜精品在线不卡| 久久人人爽人人人人片| 国产女主播白浆在线观看| 国产乱人伦av麻豆网| 国产一国产一级新婚之夜| 亚洲最新版无码AV| 无码国产精品一区二区AV| 好吊视频一区二区三区人妖| 亚洲视频高清不卡在线观看| 久久9966精品国产免费| 99re6免费精品视频播放| 日本大胆欧美人术艺术动态| 少妇被粗大的猛烈进出视频| 中国女人内射6xxxxx| 99久久精品国产综合婷婷| 亚洲国产一区二区A毛片| 少妇久久久被弄到高潮| 亚洲熟妇少妇任你躁在线观看无码 | 欧美成年性h版影视中文字幕| 国产午夜福利在线观看红色| 国产精品_国产精品_k频道 | 97超级碰碰人妻中文字幕| 四虎在线播放亚洲成人| 少妇人妻无码永久免费视频| 人妻中文字幕有码在线| 日韩理论午夜无码| 黑人巨大精品欧美视频一区| 国产精品中文字幕二区| 无码Av在线一区二区三区| 免费又黄又爽又猛的毛片| 亚洲精品视频免费| 一个人看的www片| 日韩亚洲国产av自拍| 久久亚洲国产中v天仙www| 日韩中文字幕v亚洲中文字幕| 伊人久久精品一区二区三区| 国产97色在线 | 国产| 国产成人剧情av在线| 国产网站在线看| 亚洲日本丝袜丝袜办公室| 国产精品毛片a∨一区二区三区|