太空是人类继陆地、海洋和大气层之后开辟的一个新的活动疆城。航天器一旦进入太空轨道,它的活动就超越了一个国家的范围,而具有广泛的国际性。作为探索、开发和利用太空的技术——航天技术是一门具有鲜明的国际性、世界性特点的技术。经过近三十年的努力,我国已经成为世界上少数几个掌握了先进的航天技术,开展经常性航天活动的空间国家之一。随着我国的航天事业由试验阶段转入实用阶段,我国的航天发 Space is a new territory created by mankind after land, sea and atmosphere. As soon as a spacecraft enters space orbit, its activities go beyond the limits of one country and are broadly international. As a technology to explore, develop and utilize space technology, space technology is a distinctive international and worldwide technology. After nearly 30 years of hard work, our country has become one of the few space countries in the world who has mastered advanced space technology and carried out frequent space activities. As China’s space industry turns from a pilot phase into a practical phase, China’s space flight