论文部分内容阅读
空间技术及其意义 宇宙空间蕴藏着取之不尽的物质财富,期待人类去开发利用。空间技术就是探索、开发和利用宇宙空间的技术,又称太空技术和航天技术。 讨论航天,那么什么是天?有两种定义。一种定义认为,天是指地球大气层以外无限遥远的空间。另一种定义认为,天是指地球大气层以外至太阳系内的空间。据此,大气层以外太阳系以内的航行活动则称之为航天,而太阳系以外的航行活动称之为航宇。在相当长的历史阶段内,人类只能实现航天活动。因为任何一种航行活动都
Space technology and its significance The universe contains endless material wealth, looking forward to the development and utilization of mankind. Space technology is to explore, develop and make use of space technology, also known as space technology and space technology. Discuss aerospace, then what is the sky? There are two definitions. One definition holds that the sky is an infinitely distant space beyond the Earth’s atmosphere. Another definition holds that the sky refers to space outside the Earth’s atmosphere to the solar system. Accordingly, navigational activities within the solar system outside the atmosphere are referred to as aerospace, while navigation activities other than the solar system are called aerospace. For a long period of history, mankind can only achieve space activities. Because of any kind of sailing activities