The astronauts had Chucang activities for the smooth development of space activities and the continued development of space technology, the establishment of the immortal feats.
1973, the United States launched its the only space Inflatable sports station - "Skylab." Orbit and found that it's a pair of solar wings was a rise in high-speed airflow Chongdiao, another micro-meteoroids entangled debris shield, not a stretch, not generating the same time, due to the loss of heat by Jianzuo The micro-meteoroids shields, "Skylab" the temperature was as high as 50 ℃. The first batch of astronauts arrived at the station, the first task is to pile exposed to debris shields will be cut off, open the solar wings, and one from the ground the umbrella sunshades, the laying of the "laboratory" of North Korea The side of the sun, so that "laboratory" began electricity, indoor temperature fell to about 20 ℃ at room temperature, and saved the endangered scrapped the "Skylab."
1993 to 2002, U.S. astronauts in space four times in 1990 to heaven repair the Hubble Space Telescope, the replacement of defective equipment, components, installation of sophisticated new equipment, not only corrected the Hubble Space Telescope on the ground at the time of manufacture hidden Low-level errors and improve the observation ability to extend the working life. Repair the Hubble Space Telescope is by far the most prominent member of extravehicular activities of the results.
Soviet Union / Russia since 1969, the Union of Inflatable sports spacecraft and space station, Salyut 7 on the astronauts carried out dozens of Chucang activities, in particular, peace is more modular space station module, the astronauts continue to rely on the extravehicular check , Maintenance, replacement of obsolete equipment or failure, the installation of a new experimental pieces, making it the work of life in space from the originally planned five-year extension to 15.