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International Space Station
The International Space Station (ISS) is built by a collaboration of five space agencies and their contractors: NASA (United States), Roscosmos (Russia), JAXA (Japan), ESA (Europe), and CSA (Canada). Its primary purpose is to perform microgravity and space environment experiments.
The ISS is the largest space station ever built. It weighs over 400 tons and is over 100 meters across, making it the size of a soccer field.
It began in 1998 by docking modules from Russia and the United States in space, and it took more than a decade to get what it is now. Modules manufactured in different countries were sent into space by rockets and assembled.
The International Space Station orbits the Earth 15.5 times per day at an altitude of about 400 km. So sometimes you can see it in the sky. The brightness varies depending on the conditions, but at its brightest, it is brighter than Venus, making it the second brightest after the sun and the moon. Unlike airplanes, they do not blink, but move slowly in a straight line and then disappear. Please visit a site that tells you when you can see the ISS in your area and look for the International Space Station in the night sky.
To use a treadmill in a zero-gravity space, you must tie and fix your body with a special rubber band. Astronauts should exercise for two hours a day to prevent their bones and muscles from weakening.
This is the dining area of the International Space Station. Most foods are vacuum-sealed in plastic bags. Cans are rare because they are heavy and expensive to transport. For reference, it cost between 20,000$ and 60,000$ to carry 1 kg to the ISS before SpaceX's reusable rocket was used.
The movement of water in zero gravity space is interesting. In space without gravity, movement is caused by surface tension.
This is the view of Earth from the International Space Station. It is said that the most beautiful sight seen from the ISS is the Aurora.
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