Stuck in space, Sunita Williams begins new research with extra 'free time'; Here's what it is

NASA astronauts Sunita Williams and Butch Wilmore, who were launched aboard Boeing’s Starliner spacecraft on June 5, have been stranded in space longer than planned due to technical problems. Initially, their mission was to last just 10 days, but complications with the spacecraft's propulsion system, including helium leaks and thruster failures, have extended their stay at the International Space Station (ISS).

Scientific Research and Plant Growth Studies
While awaiting their return, Williams and Wilmore are focusing on crucial scientific research. According to NASA, the astronauts are “exploring ways to effectively water plants in the weightless environment.” They are conducting experiments in the Harmony module, which serves as a connecting passageway between international space labs and spacecraft. Harmony provides essential life-support systems, including air, power, and water.


Williams and Wilmore have been testing various methods to manage plant growth in microgravity. “The duo took turns throughout the day in the Harmony module testing how root models and plants of various sizes would absorb water in microgravity,” NASA reported.

Their research includes techniques like hydroponics and air circulation to nourish plants growing aboard spacecraft. Williams initially set up Plant Water Management hardware and tested different liquid flow methods, while Wilmore conducted additional tests with hydroponics and air circulation techniques.

In addition, Williams “investigated using fluid physics such as surface tension to overcome the lack of gravity when watering and nourishing plants grown in space,” NASA said. This work is vital for future long-duration space missions where growing food could become essential.

Technical Issues and Ground Testing
The prolonged mission has been a result of issues with the Starliner’s propulsion system. As a corrective measure, NASA and Boeing recently completed ground hot fire testing of the spacecraft’s reaction control system thruster at the White Sands Test Facility in New Mexico. “The test series involved firing the engine through similar in-flight conditions the spacecraft experienced during its approach to the space station,” NASA stated. This testing is crucial for ensuring the spacecraft’s safety during its return to Earth.

Upcoming Media Briefing
NASA is scheduled to hold a media teleconference at 9 PM on July 25 to provide updates on the mission and the astronauts’ return. The briefing will cover the latest status of the Starliner spacecraft and insights from the “ground hot fire testing” being conducted.

The interaction may also offer details on the astronauts' potential return timeline. NASA's commercial crew program director Steve Stich indicated that the earliest the astronauts might return is by the end of July, though no exact date has been set.

The Starliner mission, part of NASA’s Commercial Crew Program, was intended as an end-to-end test of the spacecraft's capabilities. Despite the delays, the extended mission has allowed for valuable research and testing. Boeing's Mark Nappi emphasized that in an emergency, the spacecraft and crew could return immediately, although the company aims to resolve all technical issues before proceeding.

This mission is a significant step in NASA's efforts to certify the Starliner for future missions and expand access to low Earth orbit and the ISS. The successful resolution of these issues will support NASA's goal of increasing opportunities for scientific research and commercial ventures in space.