Aviation refers to the navigation activities of manned or unmanned aircraft in Atmosphere of Earth; Space flight refers to the navigation activities of manned or unmanned spacecraft outside the Atmosphere of Earth, also known as space flight or space navigation. In order to expand social production, humans must inevitably explore new activity spaces. From land to ocean, from ocean to atmosphere, and then to space, it is a process of gradually expanding the range of human activities.

Aerospace is a product of human expansion of the atmosphere and space. After over a hundred years of rapid development, aerospace has become one of the most active and influential scientific and technological fields in the 21st century. The significant achievements in this field mark the latest development of human civilization and also represent the advanced level of a country's science and technology.