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International space station
Transcript of International space station
The ISS is a space
the planet in the
LOW EARTH orbit. Built by contributors
from the US, Russia,
Canada, Japan, Brazil
and the ESA, the ISS
is the biggest artificial
satelite that has ever
orbited Earth Assembly
The first piece of the ISS, called Zarya
was lauched in 1998. As of september 2010, 150 total elements had been added to the structure. Parts are assembled on Eath
and are launched into space,
where the astronauts connect
the pieces using spacewalks. To power the Station,
they use photovoltaics.
This means that the
on the sides of the ISS
convert solar radiation
into electric energy. Because of the gravity and drag, the ISS
looses altitude constantly. To keep it in
orbit, a "boost" has be performed. This
happend a few times a year and can be
done by using the Station's engines. On board Because the ISS completes
16 rotations around the Earth
in one day (24 hours), at "night"
windows are covered to make it
seem as if it is dark outside. In their ISS "room," astronauts can do practically anything they could do in their real room. They can write, read, use their laptops, and store their things in shelves in the walls. Dangers Without gravity, astronauts don't have to use their muscles as much. If a person experiences prolonged weightlessness, their muscles and skeleton would deteriorate. To counteract this, astronauts spend atleast 2 hours a day exercising. Exercise At the heigt the ISS is orbiting, there are many old satelites, fragments, and natural debris. If one were to hit the Station or an astronaut during a spacewalk, the result could be fatal. Debris This is the entry hole of a piece of space debris on the space shuttle Endeavour. Space debris around Earth (There's a lot, isn't there?)