2011年11月3日,我国神舟八号宇宙飞船成功升天并实现同天宫一号的交会对接,这标志着我国载人航天和空间站工程第二步战略迈出了关键性的步伐。50年前的加加林载人航天是人类驾驶和乘坐载人航天器飞往太空,去从事各种探测、研究、试验、生产和军事应用等活动,最终要返回地球。载人航天需要突破地球大气的屏障和克服地球引力,把人类活动范围从陆地、海洋、大气层扩展到太空,更广泛 On November 3, 2011, the successful ascent of China’s Shenzhou-8 spacecraft and the rendezvous and docking with the Tiangong-1 symbolized the crucial step of the second-step strategy of China’s manned space and space station project. 50 years ago, Gagarin manned space flight was conducted by mankind and manned spacecraft to engage in various exploration, research, test, production and military applications activities and eventually returned to Earth. Manned spacecraft need to break the barrier of the Earth’s atmosphere and overcome the gravity of the Earth, expanding the range of human activities from land, sea and atmosphere to space and wider