"Space" is made up of infinite elements and energy, and it is material. The concept of time and space exists in the universe, and the universe is a limited overall event with a beginning and an end. It is the Taiji world in the Book of Changes. There is energy, matter, time and space and events in the world of Taiji. Space is also the "everything" described by Buddhism and the "everything" described by Christianity. On Universe and Space by Yi Ke

space station

space station

The space station, also known as "space station", "orbital station" or "space station", is a manned spacecraft for many astronauts to cruise, work and live for a long time. During the operation of the space station, the replacement of astronauts and the supplement of materials and equipment can be transported by manned spacecraft or space shuttle, and materials and equipment can also be transported by unmanned spacecraft. 197 1 years ago, the Soviet union launched the world's first space station, Salute 1, and then Salute 2-7 was launched on 1983. 1986 The former Soviet Union launched the larger space station "Peace". 1973, the United States launched the skylab space station using the surplus materials from the Apollo moon landing program.