ISS Command Handover Marks Expedition 73 Shift

Ongoing Information Flow

The International Space Station held its change‑of‑command ceremony on August 5, 2025, while orbiting Earth. The event, which began at 1:10 pm Eastern Time, marked the official farewell for Crew‑10. During the ceremony, Takuya Onishi handed over command of the station to Sergey Ryzhikov as part of Expedition 73. A previous handover had taken place on April 18, 2025, when Aleksey Ovchinin passed command to Takuya Onishi. NASA carried out these changes as part of its routine crew rotation schedule, ensuring the smooth continuation of station operations.

The International Space Station hosted a change‑of‑command ceremony on August 5, 2025.

The ceremony happened while the station was in orbit around Earth.

The event started at 1:10 pm Eastern Time.

This activity was part of the farewell for Crew‑10.

Takuya Onishi passed the role of station commander to Sergey Ryzhikov.

Takuya Onishi was serving as part of Expedition 73.

An earlier command handover had taken place on April 18, 2025.

That earlier handover was from Aleksey Ovchinin to Takuya Onishi.

NASA arranged these command changes as part of the routine crew rotation process.

Driving Factors

The International Space Station regularly conducts change‑of‑command ceremonies as part of NASA’s crew rotation schedule, ensuring uninterrupted operations in orbit. These events formally transfer leadership responsibilities from one astronaut to another, maintaining smooth coordination among international crews. On August 5, 2025, the station marked a new transition when Takuya Onishi handed command to Sergey Ryzhikov during the Crew‑10 farewell, officially beginning Expedition 73. A previous leadership shift occurred on April 18, 2025, when Aleksey Ovchinin passed command to Takuya Onishi. Such scheduled rotations are vital for mission safety, research continuity, and the long‑term collaboration between partner space agencies operating the orbiting laboratory.

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