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Expedition 73
Current long-duration mission to the International Space Station From Wikipedia, the free encyclopedia
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Expedition 73 is 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.[1] It continues the extensive scientific research conducted aboard the ISS, focusing on various fields, including biology, human physiology, physics, and materials science. The crew members also maintain and upgrade the space station systems.
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Background, Crew, and Events
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The expedition consisted of NASA astronauts Anne McClain, Nichole Ayers, and Jonny Kim, JAXA astronaut Takuya Onishi, and Roscosmos cosmonauts Kirill Peskov, Sergey Ryzhikov, and Alexey Zubritsky.
The expedition has seen one spacewalk so far. On May 1, 2025, McClain and Ayers performed a 5-hour, 44-minute EVA to install a modification kit on the port side of the station’s truss structure enabling the future installation of its seventh iROSA and relocated an antenna that communicates with approaching and departing commercial crew and cargo spacecraft.
On June 26, 2025, the crew was joined by the staff of Axiom Mission 4's Crew Dragon Grace: commander Peggy Whitson of the United States, pilot Shubhanshu Shukla of India, and mission specialists Sławosz Uznański-Wiśniewski of Poland and Tibor Kapu of Hungary.[2][3] Their mission marked India, Poland, and Hungary's return to crewed spaceflight for the first time in over 40 years.[4] During their two-week stay aboard the ISS, the astronauts carried out 60 experiments planned by 31 different countries.[3][5]
SpaceX Crew-11 arrived at the ISS on August 2, transporting NASA astronauts Zena Cardman and Michael Fincke, JAXA astronaut Kimiya Yui, and Roscosmos cosmonaut Oleg Platonov. The mission featured a handover with Crew-10 of six days. Onishi handed over command of the space station to Ryzhikov on August 5. Crew-10 departed with McClain, Ayers, Onishi, and Peskov on August 8.
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Events manifest
Events involving crewed spacecraft are listed in bold.
Previous mission: Expedition 72
19 April 2025 - Soyuz MS-26 Undocking, official switch from Expedition 72
22 April 2025 - CRS SpX-32 Docking
1 May 2025 - EVA 1 (US-93) McClain/Ayers: 5 hrs, 44 mins
23 May 2025 - CRS SpX-32 Undocking
26 June 2025 - Axiom Mission 4 Docking (Non-Expedition crew)
1 July 2025 - Progress MS-29/90P Undocking
5 July 2025 - Progress MS-31/92P Docking
14 July 2025 - Axiom Mission 4 Undocking (Non-Expedition crew)
2 August 2025 - SpaceX Crew-11 Docking
5 August 2025 - ISS Expedition 73 Change of Command Ceremony from Takuya Onishi to Sergey Ryzhikov
8 August 2025 - SpaceX Crew-10 Undocking
August 2025 - CRS SpX-33 Docking (planned)
27 November 2025 - Soyuz MS-28 Docking (planned)
8 December 2025 - ISS Expedition 73/74 Change of Command Ceremony from Sergey Ryzhikov to Michael Fincke[citation needed]
9 December 2025 - Soyuz MS-27 Undocking, official switch to Expedition 74 (planned)
Next mission: Expedition 74
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Crew
Vehicle manifest
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The Prichal aft, forward, starboard, and aft ports all have yet to be used since the module originally docked to the station and are not included in the table.
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References
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