www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

中文USEUROPEAFRICAASIA

China to launch lunar probe Monday

( Xinhua ) Updated: 2013-11-30 10:17:41

XICHANG - China will launch the Chang'e-3 lunar probe to the moon at 1:30 am Monday from Xichang Satellite Launch Center, the mission's launching headquarters said?in Xichang?Saturday.

It will be the first time for China to send a spacecraft to soft land on the surface of an extraterrestrial body, where it will conduct surveys on the moon.

Facilities at the launching site are in good condition and preparations are going well, according to the headquarters.

The probe will be launched to orbit aboard an enhanced Long March-3B carrier which is more than three meters in diameter and 56.4 meters high.

The mission will be the 25th launch of the Long March-3B, which is the most powerful launch vehicle in the Long March fleet.

Engineers have adopted technologies of high-precision guidance and control, multiple narrow window launches, transmission system for remote sensing, and reduction of the rocket's deadweight, said Cen Zheng, rocket system commander-in-chief of the mission.

Chang'e-3 comprises a lander and a moon rover called "Yutu" (Jade Rabbit). The lunar probe will land on the moon in mid-December if everything goes according to plan.

Tasks for Yutu include surveying the moon's geological structure and surface substances, while looking for natural resources.

So far, only the United States and the former Soviet Union have soft-landed on the moon.

After entering lunar orbit, Chang'e-3 will go through six stages of deceleration to descend from 15 km above to the lunar surface.

The soft-landing processes of the U.S. and former Soviet Union's unmanned spacecraft had no capacity to hover or avoid obstacles. Chang'e-3, on the other hand, can accurately survey landforms at the landing site and identify the safest spots on which to land.

In order to land quickly, the probe is equipped with high-precision, fast-response sensors to analyze its motion and surroundings. The variable thrust engine (completely designed and made by Chinese scientists) can generate up to 7,500 newtons of thrust.

Narrow windows for China's lunar probe launch

The launch of China's Chang'e-3 lunar probe, scheduled in early December, will have to target multiple narrow windows that last only minutes each, said a spokesman for the project Friday.

"The lunar probe currently has two launch windows each day for three consecutive days. The first window on the first day lasts four minutes, and the second window one minute," said Pei Zhaoyu, spokesman for the lunar probe mission, at a press briefing in Xichang, Sichuan province. [Full story]

Backgrounder: China's 'triple jump' progress in lunar probes

The upcoming Chang'e-3 mission will carry the first Chinese spacecraft to soft-land on and explore an extraterrestrial object.

The Chang'e-1 to Chang'e-3 missions have made a "triple jump" between 2007 and 2013. [Full story]

 

Most Popular
Special
...
...
主站蜘蛛池模板: 欧美日韩高清在线观看一区二区 | 成人在线高清 | 男女视频在线观看免费高清观看 | 国产精品青草久久 | 日韩美女网站在线看 | 一道本久久 | 国产精品成人久久久 | 日韩美女专区中文字幕 | 国产91会所洗浴女技师按摩 | 高清国产在线播放成人 | 欧美激情精品久久久久久久久久 | 岛国大片在线播放免费 | 久草免费在线播放视频 | 久久久久依人综合影院 | 日本高清视频免费在线观看 | 黄网视频在线观看 | 在线一区免费播放 | 欧美一级特黄刺激爽大片 | 毛片免费全部免费观看 | 欧美在线黄 | 国产欧美综合一区二区 | 国产r67194吃奶视频 | aaaaaa精品视频在线观看 | 自拍偷拍二区 | 91九色精品国产 | 亚洲视频自拍 | 91视频啪啪 | 韩国成人毛片aaa黄 韩国福利一区 | 成人午夜在线 | 亚洲免费在线视频观看 | 毛片在线视频在线播放 | 亚洲haose在线观看 | 日韩福利视频精品专区 | a毛片在线看片免费 | 久久精品视频网 | 美女又黄又免费 | 成人高清毛片a | 国产在线观看成人免费视频 | 中国日本高清免费视频网 | 欧美一区二区三区在线播放 | 欧美野外性k8播放性迷宫 |