The final words of a 30-year era of orbital flight

Space · Published 22 October 2026 Swipe more like this →

In short: On February 21, the crew of the space shuttle Endeavour stepped onto the tarmac at Kennedy Space Center. Their return marked a milestone in a three-decade journey of human endurance, marking the conclusion of a fleet that built the largest structure in space.

The return of the Endeavour crew on February 21 served as a poignant moment for the Space Shuttle Program, which spanned 30 years of continuous operation. From the first launch of Columbia on April 12, 1981, to the final landing of Atlantis on July 21, 2011, the shuttle fleet completed 135 missions. These flights were not merely transport vehicles; they were the primary means by which NASA constructed the International Space Station, the largest structure ever built in space. The fleet included five distinct orbiters: Columbia, Challenger, Discovery, Atlantis, and Endeavour. These vehicles were used to conduct cutting-edge research in orbit. They also performed the critical task of recovering and repairing various satellites.

Throughout its history, the shuttle fleet achieved numerous firsts that expanded human reach. It carried Sally Ride, the first American woman in space, on mission STS-7, and Guion Bluford, the first African-American in space, on mission STS-8. The shuttle also transported the first astronaut representing the European Space Agency during mission STS-9. It carried the Long Duration Exposure Facility as a primary payload on mission STS-41C.

The program also pioneered technical milestones, such as the first untethered space walks conducted by McCandless and Stewart during mission STS-41B, and the first Spacelab mission on STS-9. Beyond human milestones, the shuttle served as a versatile workhorse for global infrastructure. It was responsible for launching, recovering, and repairing satellites, as well as deploying commercial communications satellites like SBS-4. By the time the final mission, STS-135, concluded in 2011, the shuttle fleet had transformed from a series of experimental test flights—such as the second test flight to demonstrate safe re-launch and return—into a cornerstone of international scientific research and orbital logistics. The first operational mission, STS-5, deployed two commercial satellites. Early flights like STS-6 saw the maiden flight of Challenger. It also deployed the first Tracking and Data Relay Satellite into orbit.

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