Aviation refers to the navigation activities of manned or unmanned aircraft in the earth's atmosphere; Space flight refers to the navigation activities of manned or unmanned spacecraft outside the earth's atmosphere, also known as space flight or space navigation. In order to expand social production, mankind must open up new activity space. From the land to the ocean, from the ocean to the atmosphere, and then to space, is such a process that human beings gradually expand the scope of activities.
Aerospace is the product of human expanding the atmosphere and space. After more than 100 years of rapid development, aerospace has become one of the most active and influential fields of science and technology in the 21st century. The major achievements in this field not only mark the latest development of human civilization, but also represent the advanced level of a country's science and technology.