金沙平台官网注册网址

SpaceX Falcon Heavy rocket test is the start of a race to Mars

作者:尹被    发布时间:2017-08-08 02:00:01    

SpaceX By Paul Marks Just five months before Apollo astronaut Neil Armstrong set foot on the moon in 1969, an unwieldy cluster of 30 engines roared into life beneath a monster rocket on a launch pad in Kazakhstan. Within seconds the uncrewed maiden launch of the Soviet Union’s N1 moon rocket was in deep trouble. Its control system, and the complex plumbing that fuelled its motors, failed. Engine after engine shut down, causing severe vibrations,

 

Copyright © 网站地图