irst-ever soft landi
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e-4 probe, launched from the

arren world.At 10:15 a.m., a variable thrust engine was ▓ignited with the assistance of the rel▓ay satellite Queqiao (Magpie Bridge), operating in the halo orbit around the second Lagrangian (L2) point of the Earth-moon system, about 65,000 km from th▓e moon, where it can see both Earth and the moon's far side.Chang'e-4's relative velocity ▓to the moon was lowered from 1.7 km per second to close t▓o zero, and the probe was adjusted to face the moon and d▓escend vertically towards t

Xicha▓ng Sat

he Von Karman Crater in the SPA Basin.When it descended to an altitude of about 2 km, its cameras captured the shad▓ows of the hills and valleys on the lunar surface. Its computer identified and assessed la▓rge obstacles such as rocks and craters, so the probe could avoid them.At 100 meters up, the probe hovered to ident▓ify smaller obstacles and measured the slopes on the surface

ellite Launch Cent

. Its computer calculated again and selected the safest site.At 2 meters above the surface, the engine stopped, and then the golden lander with a silver rover on top▓ touched down on the desolate gray surface with four legs, throwing up some dust.The probe performed the entire landing process, lasting about 12 minutes with no▓ intervention from ground control, and the relay satellite transmitted the first clo▓se-up photos of th

e moon's far side back to a▓ control center in Beijing.The China Na▓tional Space Administration later announced that the pr▓obe landed at the preselected landing area at 177.6 degrees east longitude and 45.5 degrees south latit

ude on the far side of the moon."It's ▓an important milestone for China's space exp▓loration," said Wu Weiren, chief designer of Chi▓na's lunar exploration program."It is a perfect display of human intelligence," said Jia▓ Yang, deputy chief designer of the Chang'

er in southwest

e-4 probe, from th▓e China Academy of Space Technology (CAST).Named aft

er Chinese moon goddess "Chang'e," China's lunar exploration program, which began in 2004, ▓includes orbiting and landing on the moon, and bringing samples back to Earth.After Chang▓'e-3 completed China's first soft landing on the moon in 2013, Chinese space experts aim

China on Dec. 8,▓ 2018, has s

ed high, h▓oping Chang'e-4 could carry out unpreced▓ented and more challenging tasks."Landing o▓n the far side of the moon is more risky than landing on the near side. The rugged terrain on the far side has raised many problems," said Sun Zezhou, chief designer

een countless crat

of Chang'e-4 probe, from CAST."But solving those problems m▓ight help lay the foundation for future space exploration. Hig

ers, mountains a▓ nd valleys on th e moon.Finally, it s destination on the far side, the Sou th Pole-Aitken (SPA) Bas in, the largest, deepest and oldest cr ater i▓n the solar system, was il luminated by the risin g sun.The deve lopers of Chang'e- 4 decided on Thu r▓sday it was the tim e to come down on this b 遵义市wap 海林市5G 林口县wap 潞西市5G 忻州市5G 乌兰浩特市5G 贺州市wap 河津市5G 泸定县wap 会理县5G 新宾满族自治县5G 临泉县5G 巴中市wap 宣威市5G 乐昌市wap 双牌县wap 敦化市5G 太和县wap 双流县wap 上虞市5G 玩传奇私服怎么赚钱 传奇私服收费挂 暗黑版本传奇私服攻略 热血传奇私服架设教程 最新开传奇私服发布网 战士彻地丁传奇私服 传奇私服补丁是放哪里 传奇私服发布网 传奇私服手机电脑通用 传奇私服架设版本下载