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: 免费看黄色的网址 | 一级毛片无毒不卡直接观看 | 国产精品青草久久 | 国产美女主播一级成人毛片 | 亚洲无卡视频 | 久久久国产在线 | 依依成人综合网 | 欧美精品成人一区二区视频一 | 精品亚洲福利一区二区 | 男人好大好硬好爽免费视频 | 国产成年 | 亚洲欧美日韩在线播放 | 高清一级淫片a级中文字幕 高清一区二区 | 日本欧美一级二级三级不卡 | 在线观看免费视频网站色 | 成人欧美日韩高清不卡 | 国产一区视频在线播放 | 99在线观看视频 | 国产一极毛片 | 女人把腿劈开让男人桶的网站 | 久久久久久久99精品免费 | 男女午夜爽爽 | 亚洲爽爽 | 欧美日韩高清不卡一区二区三区 | 亚洲综合一区二区精品久久 | 久久99热精品免费观看k影院 | 69日本xxxxxxxxx13 69视频成人 | 国产成人看片免费视频观看 | 99精品国产兔费观看久久99 | 欧美国产精品亚洲精品第一区 | 欧美做暖小视频xo免费 | 中文字幕亚洲视频 | 性做久久久久久久免费观看 | 中文字幕在线看片成人 | 精品无码一区在线观看 | 午夜欧美| 美女很黄很黄免费 | 亚洲三级在线播放 | 中文字幕成人网 | 成人精品免费视频 | 91精品国产爱久久久久 |