The logistics of orbital expansion: how Discovery fueled the ISS

Space · Published 21 October 2026 Swipe more like this →

In short: Space exploration is as much about heavy lifting as it is about high science. During mission STS-131, the space shuttle Discovery acted as a vital courier, delivering a multi-purpose logistics module to the International Space Station to expand its laboratory capabilities and replace essential hardware.

Launched on April 5, 2010, from NASA's Kennedy Space Center, STS-131 marked the 33rd shuttle mission to the International Space Station. The primary objective was the delivery of a multi-purpose logistics module, which contained various science racks designed to be transferred into the station's laboratories. This mission highlights the role of the shuttle as a critical infrastructure vehicle, moving beyond mere exploration to the active maintenance and expansion of permanent human habitats in orbit. The shuttle launched from Pad 39A at 6:21 a.m. EDT. This specific liftoff occurred just 45 minutes before the sun rose on Monday. The vehicle's two solid rocket boosters ignited exactly as planned.

The seven-member crew, led by Commander Alan Poindexter, included several first-time flyers, such as Jim Dutton, Dottie Metcalf-Lindenburger, and Naoko Yamazaki. Several achievements defined this voyage: four female astronauts travelled into orbit as a group for the first time, while two Japan Aerospace Exploration Agency personnel also occupied space concurrently for the first time. Despite facing technical difficulties and a weather-delayed landing, the crew successfully completed three spacewalks to outfit the station. The team included Mission Specialists Stephanie Wilson and Clay Anderson. The crew total reached 13 people once they joined the station. This flight marked a significant milestone for international cooperation.

The mission concluded on April 20, 2010, after a duration of 15 days, 2 hours, 47 minutes, and 10 seconds. During this time, the shuttle traveled approximately 6.2 million miles. By successfully replacing and retrieving parts at the station, STS-131 demonstrated the iterative nature of space science—where the ability to swap out components and upgrade hardware is just as important as the initial voyage into the void. The shuttle reached an altitude of 122 nautical miles. It maintained an orbital inclination of 51.6 degrees. The final touchdown occurred at 9:08 a.m. EDT in Florida.

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