国产热热热精品,亚洲视频久久】日韩,三级婷婷在线久久,99人妻精品视频,精品九热人人肉肉在线,AV东京热一区二区,91po在线视频观看,久久激情宗合,青青草黄色手机视频

China / Innovation

Returning lunar orbiter makes skip re-entry

(Xinhua) Updated: 2014-11-01 06:53

BEIJING -- The return module of China's test lunar orbiter made a skip re-entry before plunging into the terrestrial atmosphere for a much anticipated home coming.

If all goes well, it will finally touch down in Siziwang Banner in Inner Mongolia later.

Before its re-entry into Earth, the spacecraft was moving at a velocity of 11.2 kilometers per second. This speed can generate temperatures of more than 1,500 degrees Celsius.

To help the craft slow down, scientists have employed a Soviet-designed method by letting the craft "bounce" off the edge of the Earth's atmosphere, before re-entering again.

The re-entry angle has to be guided so precisely that a 0.2 degrees deviation would render the mission a failure. Experts have previous compared the process to "stone skipping," which helps cut the "braking distance" for the orbiter.

Highlights
Hot Topics
...
1 End --> 伊春市| 七台河市| 临湘市| 楚雄市| 措美县| 仁寿县| 定南县| 方正县| 务川| 兴安县| 横峰县| 民和| 丰都县| 徐州市| 乌什县| 夏邑县| 阳泉市| 米易县| 通河县| 德江县| 辽宁省| 防城港市| 海安县| 班戈县| 连南| 达拉特旗| 洪泽县| 汶上县| 宁陵县| 峡江县| 当阳市| 志丹县| 奇台县| 石台县| 田东县| 阿合奇县| 武义县| 东安县| 华亭县| 临西县| 虹口区|