A space station is an artificial structure designed for humans to live and work in outer space for a period of time.
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| The International Space Station (ISS) |
To date, only low earth orbital (LEO) stations have been implemented, otherwise known as orbital stations. A space station is distinguished from other manned spacecraft by its lack of major propulsion or landing facilities—instead, other vehicles are used as transport to and from the station. Current and recent-history space stations are designed for medium-term living in orbit, for periods of weeks, months, or even years. The only space station currently in use is the International Space Station. Previous stations include the Almaz and Salyut series, Skylab and Mir.
Space stations are used to study the effects of long-term space flight on the human body as well as to provide platforms for greater number and length of scientific studies than available on other space vehicles. Since the ill-fated flight of Soyuz 11 to Salyut 1, all manned spaceflight duration records have been set aboard space stations. The duration record for a single spaceflight is 437.7 days, set by Valeriy Polyakov aboard Mir from 1994 to 1995. As of 2009[update], three astronauts have completed single missions of over a year, all aboard Mir.
Space stations have been used for both military and civilian purposes. The last military-use space station was Salyut 5, which was used by the Almaz program of the Soviet Union in 1976 and 1977.
Future developments
- The People's Republic of China is expected to launch its first space station named Tiangong 1 in the first half of 2011. This would make China the third country to launch a space station. China will be launching two more space labs called Tiangong 2 and Tiangong 3 before 2016. It will then launch a 30-ton space station by 2022. Project 921-2 is the working name given by the People's Republic of China for plans to create a manned space station.
- Currently, Bigelow Aerospace is developing commercial inflatable habitat modules, derived from the earlier NASA Transhab concept, intended to be used for space station construction and for a space prize they are funding and operating, America's Space Prize. Genesis I and Genesis II are ⅓-scale unmanned prototype modules orbited to test the feasibility of inflatable structures and other systems in space. Future modules include the Galaxy, Sundancer and BA 330, each being progressively larger and more complicated, with the BA 330 intended as the full-scale manned production model for Bigelow's expandable space habitation module program.
- In April 2008, the Russian space agency has proposed the construction of an orbital construction yard for spacecraft too heavy to launch from Earth directly. It would not begin construction or be finished until after the decommissioning of the International Space Station. This plan was described to ISS partners by Anatoly Perminov June 17, 2009.
- Galactic Suite is a space hotel planned to be operational by 2012.
- Excalibur Almaz plans to refit Soviet Almaz space stations for commercial purposes
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