NASA Astronauts Return: Barry Wilmore and Sunita Williams

NASA astronauts Barry Wilmore and Sunita Williams, who embarked on a short-duration mission aboard Boeing’s Starliner on June 5, 2024, are set to return to Earth after nearly 10 months in space. Their extended stay resulted from technical difficulties with the Starliner, prompting NASA to revise their return plan.

Return Schedule for NASA Astronauts

According to the latest NASA schedule, the astronauts are expected to leave the International Space Station (ISS) on March 16, 2025, aboard SpaceX’s Crew Dragon, following the arrival of the Crew-10 mission.

Changes to Original Plans

Originally, the Starliner capsule was intended to bring Wilmore and Williams back within 10 days of arriving at the ISS. However, due to technical evaluations, NASA opted against using Starliner for their return, choosing instead an uncrewed return of the spacecraft in September 2024.

Modified Crew Rotation Plans

With Starliner no longer viable for their return, NASA altered its crew rotation strategy by reserving two seats on the Crew-9 return mission, which uses SpaceX’s Crew Dragon. Initially scheduled for February 2025, this return journey faced further delays due to operational constraints, but is now officially set for March 16, 2025.

Arrival of Crew-10

Before Wilmore and Williams can depart, the Crew-10 mission must first reach the ISS. This launch is scheduled for March 12, 2025, from Kennedy Space Center in Florida, and will carry a four-member crew:

• Anne McClain (NASA) – Commander
• Nichole Ayers (NASA) – Pilot
• Takuya Onishi (JAXA) – Mission Specialist
• Kirill Peskov (Roscosmos) – Mission Specialist

The arrival of Crew-10 will enable Crew-9, including Wilmore and Williams, to finally return to Earth, concluding a mission that has exceeded the original timeline significantly.

SpaceX’s Dragon Capsule “Endurance”

NASA confirmed that Crew-10 will be launched aboard the SpaceX Dragon capsule named “Endurance,” a spacecraft that has successfully flown in earlier missions. Initially, NASA contemplated using a newly constructed spacecraft, but delays related to battery issues led to the decision to opt for the Endurance capsule instead.

Mission Planning Adjustments

Steve Stich, NASA’s Commercial Crew Program Manager, noted during a briefing, that changes in vehicle assignments are a normal part of mission planning.

Despite the ongoing scrutiny of the Starliner program, NASA’s dependence on SpaceX’s Crew Dragon is increasing, emphasising the significance of reliable flight hardware for upcoming missions.

For Wilmore and Williams, their scheduled return on March 16 will mark the conclusion of a record-breaking and unintended mission extension. While the Boeing Starliner test flight was designed to showcase reliability, it has instead brought to light substantial challenges that NASA must address before it can commit Starliner to regular crewed missions.