Progress MS-35 (96P) is a routine cargo resupply mission to the International Space Station conducted by the Russian Federal Space Agency. The uncrewed Progress spacecraft carries supplies, equipment, and provisions essential for crew operations and station maintenance. Beyond its primary resupply function, Progress vehicles serve a critical secondary role: periodic engine firings commanded by mission control raise the Station's orbit by several kilometers to counteract atmospheric drag, which would otherwise cause the orbital outpost to gradually descend toward re-entry.

The Soyuz 2.1b rocket, a proven workhorse of Russian spaceflight, launched from the Baikonur Cosmodrome in Kazakhstan on September 16, 2026, at 13:33 UTC. Baikonur remains the world's oldest and busiest operational spaceport, having supported space operations since the Soviet era. The Soyuz 2.1b is a modern variant of the legendary Soyuz family of rockets, renowned for reliability and consistent performance across hundreds of missions.

The launch proceeded successfully as scheduled. Progress MS-35 achieved its target low Earth orbit and is en route to dock with the International Space Station. This mission continues the uninterrupted supply line that has sustained continuous human presence in low Earth orbit for over two decades, demonstrating the enduring importance of cargo resupply operations in space station operations.