国际空间站英语PPT课件

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Platform
life science
The station provides a unique environment for the testing of the spacecraft systems that will be required for missions to the Moon and Mars.
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Docking
• Spacecraft from Russia and Europe are able to launch and fly themselves without human intervention
• From 26 February 2011 to 7 March 2011, during STS-133, four of the governmental partners (United States, ESA, Japan and Russia) had their spacecraft (NASA Shuttle, ATV, HTV, Progress and Soyuz) docked at the ISS
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Power supply
Double-sided solar, or Photovoltaic arrays, provide electrical power for the ISS. These bifacial cells are more efficient and operate at a lower temperature than singlesided cells commonly used on Earth, by collecting sunlight on one side and light reflected off the Earth on the other.
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Station structure
• The ISS is a 'third generation' or modular space station.this allows the mission to be changed over time, new modules can be added or removed from the existing structure, saving considerable costs and allowing greater flexibility.
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The station is maintained at an orbit between 278 km (173 mi) and 460 km (286 mi) altitude, and travels at an average speed of 27,743 km/h (17,239.2 mph), completing 15.7 orbits per day. The ISS is operated by Expedition crews of six astronauts and cosmonauts .
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Origins
• The International Space Station represents a combination of three national space station projects, NASA's Freedom, the RSA's Mir-2, and the European Columbus space stations.
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• In September 1993, American Vice-President Al Gore, Jr., and Russian Prime Minister Viktor Chernomyrdin announced plans for a new space station, which eventually became the International Space Station.
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Work
• In general, the crew wenku.baidu.comorks ten hours per day on a weekday, and five hours on Saturdays, with the rest of the time their own for relaxation or work catch-up
Research on the ISS improves knowledge about the effects of long-term space exposure on the human body. Subjects currently under study include muscle atrophy, bone loss, and fluid shift.
• Astronaut Ron Garan during an STS-124 ISS assembly spacewalk
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Station systems and operations
• Life support • Power supply • Docking • Work
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Life support
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Crew health
• The most significant adverse effects of longterm weightlessness are muscle atrophy and deterioration of the skeleton, or spaceflight osteopenia.So...
International Space Station
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The International Space Station (ISS) is a habitable, artificial satellite in low Earth orbit. The ISS serves as a research laboratory that has a microgravity environment in which crews conduct experiments in many fields including biology, human biology, physics, astronomy and meteorology.
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