Mobile Servicing System.
robotic system on board the International Space Station
ISS Expedition 74/75 Ends 241-Day Mission
NASA astronaut Chris Williams and Roscosmos cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev closed the hatch on the Soyuz MS-28 and prepared for a 241-day mission return from the ISS, with undocking set for early Sunday and a Kazakhstan landing later that morning. The schedule calls for undocking at 3:03 a.m. EDT and a 6:25 a.m. EDT landing, with NASA live coverage continuing through the deorbit and reentry.
Science · 61 sources · Jul 27, 2026Read itThe journal
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About Mobile Servicing System
The Mobile Servicing System (MSS) is a robotic system on board the International Space Station (ISS). Launched to the ISS in 2001, it plays a key role in station assembly and maintenance; it moves equipment and supplies around the station, supports astronauts working in space, services instruments and other payloads attached to the ISS, and is used for external maintenance. Astronauts receive specialized training to perform these functions with the various systems of the MSS.
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