NASA EXPRESS Racks Achieve 1 Million Hours of Service on Space Station

NASA astronaut Kayla Barron monitors experiments in one of the International Space Station’s 12 EXPRESS Racks during Expedition 66, which ran from October 2021 to March 2022. As many as 100 experiments at a time can be simultaneously conducted in the station’s full complement of racks, helping NASA achieve 1 million hours of powered EXPRESS Rack duty between 2001-2022. (Credits: NASA)

by Rick Smith
NASA Marshall Space Flight Center

NASA science research on the International Space Station reached an extraordinary milestone June 14.

The vital, versatile EXPRESS Racks – properly known as “EXpedite the PRocessing of Experiments to the Space Station” multipurpose payload shelving units – logged 1 million hours of combined powered duty on station. That’s the equivalent of nearly 115 years’ worth of scientific research completed in just two decades.

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