Skylab is the first experimental space station in the United States to orbit the Earth, launched by the Saturn V rocket on May 14, 1973 Composition module Orbital work module: The main living and working area for astronauts, including laboratories, dormitories, and sanitation facilities (such as showers and air wash toilets), with a volume of approximately 360m ³ and a temperature maintained at 15.6-20 ℃. Solar telescope: equipped with X-ray/ultraviolet observation equipment, used for high-precision solar research. Docking module: an interface connecting the Apollo spacecraft for astronauts to travel back and forth. The total length is 36 meters, the maximum diameter is 6.7 meters, the weight is 77-82 tons, the orbit height is 435 kilometers, the inclination angle is 50 degrees, and the operating cycle is 93 minutes.