Human spaceflight (or manned spaceflight or crewed spaceflight) is space travel with humans aboard spacecraft. When a spacecraft is manned, it can be piloted directly, as opposed to machine or robotic space probes controlled remotely by humans or through automatic methods on board the spacecraft.
Humans have been continually present in space for 700113000000000000013years and 700174000000000000074days on the International Space Station. The first manned spaceflight was launched by the Soviet Union on 12 April 1961 as a part of the Vostok program, with cosmonaut Yuri Gagarin aboard.
Currently, only Russia and China maintain human spaceflight capability independent of international cooperation. As of 2013, human spaceflights are only launched by the Soyuz program conducted by the Russian Federal Space Agency and the Shenzhou program conducted by the China National Space Administration. The United States lost human spaceflight launch capability upon retirement of the space shuttle in 2011.
In recent years there has been a gradual movement towards more commercial means of spaceflight. The first private human spaceflight took place on 21 June 2004, when SpaceShipOne conducted a suborbital flight. A number of non-governmental startup companies have sprung up, hoping to create a space tourism industry. NASA has also tried to stimulate private spaceflight through programs such as Commercial Crew Development (CCDev) and Commercial Orbital Transportation Services (COTS). With its 2011 budget proposals released in 2010,[1] the Obama administration moved towards a model where commercial companies would supply NASA with transportation services of both crew and cargo to low Earth orbit. The vehicles used for these services would then serve both NASA and potential commercial customers. NASA intended to spend $6 billion in the coming years to develop commercial crew vehicles, using a model similar to that used under COTS.[2]
The first human spaceflight took place on 12 April 1961, when cosmonaut Yuri Gagarin made one orbit around the Earth aboard the Vostok 1 spacecraft, launched by the Soviet space program. Valentina Tereshkova became the first woman in space aboard Vostok 6 on 16 June 1963. Both spacecraft were launched by Vostok 3KA launch vehicles. Alexei Leonov made the first spacewalk when he left Voskhod 2 on 8 March 1965. Svetlana Savitskaya became the first woman to do so on 25 July 1984.
The United States became the second nation to achieve manned spaceflight with the suborbital flight of astronaut Alan Shepard aboard Freedom 7 as part of Project Mercury. The spacecraft was launched on 5 May 1961 on a Redstone rocket. The first U.S. orbital flight was that of John Glenn aboard Friendship 7, launched 20 February 1962 on an Atlas rocket. From 1981 to 2011, the U.S. conducted all its human spaceflight missions with reusable space shuttles. Sally Ride became the first American woman in space in 1983. Eileen Collins was the first female shuttle pilot, and with shuttle mission STS-93 in 1999 she became the first woman to command a U.S. spacecraft.
China became the third nation to achieve human spaceflight when Yang Liwei launched into space on a Chinese-made vehicle, the Shenzhou 5, on 15 October 2003. The flight also made China the third nation to have launched its own manned spacecraft using its own launcher. The first Chinese woman, Liu Yang, was launched in June 2012 aboard Shenzhou 9. Previous European (Hermes) and Japanese (HOPE-X) domestic manned programs were abandoned after years of development, as was the first Chinese attempt, the Shuguang spacecraft.
The farthest destination for a human spaceflight mission has been the Moon. The only manned missions to the Moon have been those conducted by NASA as part of the Apollo program. The first such mission, Apollo 8, orbited the Moon but did not land. The first Moon landing mission was Apollo 11, during whichon 20 July 1969Neil Armstrong and Buzz Aldrin became the first people to set foot on the Moon. Six missions landed in total, numbered Apollo 1117, excluding Apollo 13. Altogether 12 men walked on the Moon, the only humans to have been on an extraterrestrial body. The Soviet Union discontinued its program for lunar orbiting and landing of human spaceflight missions in 1974 when Valentin Glushko became General Designer of NPO Energiya.[3]
The longest single human spaceflight is that of Valeriy Polyakov, who left Earth on 8 January 1994, and did not return until 22 March 1995 (a total of 437 days 17 hr. 58 min. 16 sec.). Sergei Krikalyov has spent the most time of anyone in space, 803 days, 9 hours, and 39 seconds altogether. The longest period of continuous human presence in space is 700113000000000000013years and 700174000000000000074days on the International Space Station, exceeding the previous record of almost 10 years (or 3,634 days) held by Mir, spanning the launch of Soyuz TM-8 on 5 September 1989 to the landing of Soyuz TM-29 on 28 August 1999.
For many years beginning in 1961, only two countries, the USSR (later Russia) and the United States, had their own astronauts. Citizens of other nations flew in space, beginning with the flight of Vladimir Remek, a Czech, on a Soviet spacecraft on 2 March 1978. As of 2010[update], citizens from 38 nations (including space tourists) have flown in space aboard Soviet, American, Russian, and Chinese spacecraft.
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Human spaceflight - Wikipedia, the free encyclopedia
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