3、NASA tracking Asteroid TB-145 with radio telescopesNASA (美国国家航空航天局)用射电望远镜跟踪小行星TB-145。4、 2:33 Nasa tests enormous rocket booster 2点33分NASA试验了巨大的火箭助推器。5、Watching the
In April 1956, the aviation industry commission of the people's Republic of China was established to lead China's aviation and rocket industry.中国航天史是从1956年二月开始的,当时著名科学家钱学森向中央提出《