On this day in space! Oct. 23, 2007: NASA launches Harmony module to ISS on STS-120 space shuttle mission
On October 23, 2007, space shuttle Discovery launched on mission STS-120 to deliver the Harmony utility module to the International Space Station. The large metal cylinder measures 14 feet wide and 24 feet long, roughly the size of a minibus.
On October 23, 2007, space shuttle Discovery launched on mission STS-120 to deliver the Harmony utility module to the International Space Station. The large metal cylinder measures 14 feet wide and 24 feet long, roughly the size of a minibus. Built for NASA by Thales Alenia Space in Italy, the module originally went by the name Node 2.
It features five common berthing mechanisms to connect different station sections and includes eight payload racks dedicated to avionics, storage, and crew quarters. The installation of Harmony expanded the station's interior volume from the size of a three-bedroom house to a five-bedroom home. It served as a critical hub to link the U.S.
Destiny laboratory with the European Columbus module and the Japanese Kibo laboratory. Before this mission, the station had not received a new room addition since 2001. Astronauts initially docked Harmony to the Unity node before the station's robotic arm moved it to its permanent location next to Destiny.
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Original publication: 24 October 2026 02:17
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