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外层空间是人类继陆地、海洋和领空之外的第四疆域。爱因斯坦曾断言,“未来科学的发展无非是继续向宏观世界和微观世界进军”。空间科学的研究对象大到宇宙天体、小到极端条件下原子与分子的运动规律,一直处于自然科学的宏观和微观前沿,被视为最有希望取得重大发现的领域。进入21世纪,世界范围内再度掀起新一轮的空间探索浪潮,越来越多的国家提出中长期空间发展计划,将人类的活动不断向深空延伸。2012
Outer space is the fourth frontier of humankind beyond land, sea and airspace. Einstein once asserted that “the development of science in the future is nothing but to continue marching toward the macro-world and the micro-world.” The objects of space science are large to the cosmic celestial bodies. The movement laws of atoms and molecules from small to extreme conditions have always been at the macroscopic and microcosmic frontiers of the natural sciences and are regarded as the most promising fields for making major discoveries. In the 21st century, a new round of wave of space exploration has been set off again in the world. More and more countries have proposed long-term and medium-term space development plans to extend human activities to deep space. 2012