Service Module
Most of the habitable elements in the ISS are cylindrical modules with most of the primary accommodations contained in the Service Module (SM), or
Zvezda (Star). The Zvezda was the first fully Russian contribution to the ISS. Some of the services contained in this module are the waste management compartment, toilet facilities, galley, exercise facilities and individual sleep compartments.
All About the Attachment
Due to the zero gravity environment, the crew can
sleep in any orientation as long as they have something to attach to. Velcro straps or a confining sleeping bag usually does the trick. Because of the high travelling speed of 17,000 miles per hour, the ISS experiences 16 sunrises and sunsets during each day. For this reason, window shades and/or eye masks are required for a sound 8 hour sleep.
Crewmembers must also attach themselves to the
toilet when using the restroom. Handles, located on either side of the toilet, clamp over the astronaut's thighs and keep him or her from floating away.
Although there is no real kitchen in the Service Module, there is a kitchen table, which aside from a place to eat around, serves as the social center of the ISS. Bungees straps and velcro help keep food, containers and spoons from floating off the table.

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Weight
1 space station (482,345 lbs) = 6 semi-trucks with maximum cargo (18,000 lbs each)
Pressurized Volume
1 space station (14,000 cubic feet) = 11 1/2 semi-trucks (1,216 cubic feet each)
Dimensional Span
span of solar arrays (256 feet) = 5 semi-trucks long (50 feet each)
Height
largest height dimension (107 feet) = 8 semi-trucks high (13 feet 6 inches each)

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The Pre-Launch Effort
In the early 80's the International Space Station, or
ISS, was originally planned to be a counterpart for the Soviet stations Salyut and Mir but was never realized. The end of the Cold War and the "race to space" rekindled international efforts to get the station on its way again. The ISS brought together the resources of NASA, the Russian Federal Space Agency, the Japan Aerospace Exploration Agency, the Canadian Space Agency and the European Space Agency.
An International Effort
After struggling with delayed funding and technical problems, the first module (Zarya) of the new International Space Station launched on November 20, 1998. Sixteen nations comprise the
International Partners, whose resources and expertise contribute to this international effort.
Complete Timeline of ISS Missions
Zarya, the first module of the ISS
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Definition
A
space station is defined as an
"artificial structure designed for humans to live in outer space."
Purpose
The main
purpose of a space station is to study the effects of long term space travel on the human body. Some key points which set a space station apart from other spacecraft are:
Lack of propulsion and landing capabilities
Provides a larger foundation for scientific experiments and research to grow from due to its longer duration in space.
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