Expedition 73

Expedition 73
	First-half crew Promotional Poster
Mission type	Long-duration expedition
Operator	NASA / Roscosmos
Mission duration	233 days, 3 hours and 43 minutes
Expedition
Space station	International Space Station
Began	19 April 2025
Ended	9 December 2025
Arrived aboard	Soyuz MS-27; SpaceX Crew-10; Soyuz MS-28; SpaceX Crew-11;
Departed aboard	Soyuz MS-27; SpaceX Crew-10;
Crew
Crew size	7–11
Members	Expedition 72/73:; Anne McClain; Nichole Ayers; Takuya Onishi; Kirill Peskov; Sergey Ryzhikov; Alexey Zubritsky; Jonny Kim; Expedition 73/74:; Zena Cardman; Michael Fincke; Kimiya Yui; Oleg Platonov; Sergey Kud-Sverchkov; Sergey Mikayev; Christopher Williams;
EVAs	3
EVA duration	18 hours, 47 minutes
	; Expedition 73 mission patch; ; The first half crew, from left to right, top row: Peskov, Kim, Ryzhikov, Zubritsky, and Onishi Bottom row: Ayers and McClain; ; The second half crew, from left to right, top row: Platonov, Kim, Ryzhikov, Zubritsky, and Yui Bottom row: Fincke and Cardman; Expeditions

Expedition 73 was the 73rd long-duration expedition to the International Space Station (ISS). The expedition began with the departure of Soyuz MS-26 on 19 April 2025 with JAXA astronaut Takuya Onishi taking over the ISS command and concluded with the undocking of Soyuz MS-27 on 9 December 2025. It continued the extensive scientific research conducted aboard the ISS, focusing on various fields, including biology, human physiology, physics, and materials science. The crew members also maintained and upgraded the space station systems.