SUNITA WILLIAMS, STARLINER, AND THE STATE OF HUMAN SPACEFLIGHT

The extended Starliner mission is likely to go down in history for testing technology, teamwork, and tenacity in equal measure

- By AYUSHEE CHAUDHARY

WHEN NASA ASTRONAUTS SUNITA WILLIAMS AND BARRY “Butch” Wilmore lifted off aboard Boeing's Starliner spacecraft on June 5, 2024, the mission was planned to be a straight-forward 8-day flight—a crucial validation for Boeing’s long-awaited commercial crew capsule. Instead, their planned brief visit extended into a 286-day mission in low Earth orbit, evolving into an extraordinary test not just of engineering, but also of human resilience, adaptability, and the realities of space exploration in the commercial era. What transpired was a reminder that space travel—even after 25 years of continuous International Space Station (ISS) operation and a decade of private sector partnerships—is still not entirely predictable.

THE LONG PATH TO STARLINER’S FLIGHT

The Boeing CST-100 Starliner was developed under NASA's Commercial Crew Programme to provide the agency with a second US-built option for transporting astronauts to and from the ISS—complementing SpaceX’s Crew Dragon. While the programme promised flexibility and redundancy, Starliner’s route to its first crewed launch was fraught with technical challenges and setbacks.

Its first uncrewed flight in 2019 was marred by software issues that prevented the spacecraft from docking with the ISS. A second, partially successful, uncrewed mission in 2022 improved outcomes but didn’t fully redeem the system. Multiple technical problems—including software bugs, corrosion in valves, and propulsion system issues—troubled the spacecraft's development.