What is the functional description of the ISS when described as a laboratory?

Answer

A permanently crewed microgravity laboratory

The International Space Station is fundamentally described by its operational status as a permanent human presence in space dedicated to scientific investigation. Specifically, it functions as a microgravity laboratory, meaning it is continuously occupied by crew members who facilitate research in an environment lacking the gravitational interference found on Earth. This permanent crewing status is a defining characteristic and represents a significant achievement in sustained global cooperation in space exploration efforts.

What is the functional description of the ISS when described as a laboratory?

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