Expedition 73

Expedition 73

Mission type	Long-duration expedition
Operator	NASA / Roscosmos
Expedition
Space station	International Space Station
Began	20 April 2025
Ended	8 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
Expedition 73 mission patch Left to right, top row: Peskov, Kim, Ryzhikov, Zubritsky and Onishi. Bottom row: Ayers and McClain. Expeditions ←  Expedition 72 Expedition 74  →

Expedition 73 will be the 73rd long-duration expedition to the International Space Station (ISS). The expedition will begin with the departure of Soyuz MS-26, expected to take place in mid-April 2025. Takuya Onishi of the Japan Aerospace Exploration Agency (JAXA) will serve as the commander of the expedition, the third JAXA astronaut to take command of the station. ^[1] It will continue the extensive scientific research conducted aboard the ISS, focusing on various fields, including biology, human physiology, physics, and materials science. The crew members will also maintain and upgrade the space station systems.

Crew

Flight	Crew member	Increment 73a	Increment 73b	Increment 73c	Increment 73d
		20 Apr-Jul 2025 (planned)	Jul 2025 (planned)	Jul-27 Nov 2025 (planned)	27 Nov-8 Dec 2025 (planned)
Soyuz MS-27 (planned)	Sergey Ryzhikov, Roscosmos Third spaceflight	Flight Engineer
	Alexey Zubritsky, Roscosmos First spaceflight	Flight Engineer
	Jonny Kim, NASA First spaceflight	Flight Engineer
SpaceX Crew-10 (planned)	Anne McClain, NASA Second spaceflight	Flight Engineer		Off Station
	Nichole Ayers, NASA First spaceflight	Flight Engineer		Off Station
	Takuya Onishi, JAXA Second spaceflight	Commander		Off Station
	Kirill Peskov, Roscosmos First spaceflight	Flight Engineer		Off Station
SpaceX Crew-11 (planned)	Zena Cardman, NASA First spaceflight	Off Station	Flight Engineer
	Michael Fincke, NASA Fourth spaceflight	Off Station	Flight Engineer
	Kimiya Yui, JAXA Second spaceflight	Off Station	Flight Engineer
	Oleg Platonov, Roscosmos First spaceflight	Off Station	Flight Engineer
Soyuz MS-28 (planned)	Sergey Kud-Sverchkov, Roscosmos Second spaceflight	Off Station			Flight Engineer
	Sergey Mikayev, Roscosmos First spaceflight	Off Station			Flight Engineer
	Christopher Williams, NASA First spaceflight	Off Station			Flight Engineer

References

1. "大西卓哉宇宙飛行士のISS船長（ISSコマンダー）就任決定" [Astronaut Takuya Onishi appointed as ISS Commander]. JAXA (in Japanese). 2 December 2024. Retrieved 24 December 2024. [We are pleased to announce that Takuya Onishi, an astronaut from the Japan Aerospace Exploration Agency (JAXA), has been selected as the ISS commander for the International Space Station (ISS) Expedition 73. Astronaut Onishi will be the third Japanese ISS commander and will lead the ISS during the Expedition 73 mission.]