NASA astronaut begins eight-month mission aboard ISS
NASA astronaut Chris Williams joins 'Fox News Sunday' from the International Space Station to discuss his eight-month mission in space, the preparation required and more.

NASA weighs cutting short International Space Station mission due to astronaut medical issue

by · Fox News

NEWYou can now listen to Fox News articles!

NASA is considering an early return of its crew aboard the International Space Station (ISS) due to an unspecific medical issue. 

The rare move comes after the agency canceled a planned spacewalk initially scheduled for Thursday, according to Reuters. 

"Safely conducting our missions is our highest priority, and we are actively evaluating all options, including the possibility of an earlier end to Crew-11's mission," a NASA spokesperson said in a statement on Wednesday night, NBC News reports.

BLUE ORIGIN LAUNCHES NEW GLENN ROCKET TO MARS AFTER DELAYS

The NASA logo is displayed at NASA’s Jet Propulsion Laboratory on Oct. 15, 2025, in La Cañada Flintridge, California.  (Mario Tama/Getty Images)

The astronaut suffering from the medical concern, who was not identified, remains in stable condition, the outlet reported.

 In a previous statement, NASA revealed it was "monitoring a medical concern with a crew member that arose Wednesday afternoon."

The four-person Crew-11 crew consists of U.S. astronauts Zena Cardman and Mike Fincke, Russian cosmonaut Oleg Platonov and Japanese astronaut Kimiya Yu.

UFO MANIA GRIPS SMALL TOWN AFTER MYSTERIOUS GLOWING OBJECT SIGHTING GOES VIRAL

Crew-11 mission astronauts walk out of the Neil A. Armstrong Operations and Checkout Building before heading to pad 39A for launch to the International Space Station (ISS) at the Kennedy Space Center on August 1, 2025 in Cape Canaveral, Florida.  (Paul Hennessy/Anadolu via Getty Images)

Fincke, the mission's designated commander, and flight engineer Cardman were anticipated to complete a 6.5 hour spacewalk on Thursday to install hardware outside the ISS.

Astronauts typically live aboard the ISS for stints of six to eight months, and are equipped with basic medical equipment and medications in the event of an emergency. The crew set off for their current eight-month mission from Florida in August and were set to return to Earth in May.

NASA ASTRONAUT'S ESTRANGED WIFE PLEADS GUILTY TO FALSELY ALLEGING FIRST CRIME COMMITTED IN SPACE

Falcon 9, Dragon, and Crew-11 launch to the International Space Station at LC-39A in Kennedy Space Center, FL, on Aug. 1, 2025. (Austin DeSisto/NurPhoto via Getty Images)

Spacewalks are highly strenuous and involve months of training.

CLICK HERE TO DOWNLOAD THE FOX NEWS APP

 Last year, NASA canceled a planned spacewalk after an astronaut reportedly experienced "spacesuit discomfort." In 2021, U.S. astronaut Mark Vande Hei’s had his spacewalk called off due to a pinched nerve. 

NASA did not immediately respond to Fox News Digital’s request for comment.  

Julia Bonavita is a U.S. Writer for Fox News Digital and a Fox Flight Team drone pilot. You can follow her at @juliabonavita13 on all platforms and send story tips to julia.bonavita@fox.com.