Astronomy and Space


What is the purpose of the International Space Station (ISS)?

The International Space Station (ISS) orbits Earth at an altitude of about 250 miles (400 kilometers). The ISS travels at 17,500 miles per hour (32,410 kilometers per hour) in an orbit that extends from 52 degrees north latitude to 52 degrees south latitude. Its main purpose is to serve as a laboratory for materials, communications technology, and biological and medical research in an environment that lacks the force of gravity.


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