The BriefNASA astronauts planned to conduct two spacewalks in January to conduct repairs and upgrades to the International Space Station.The first spacewalk, which was set to take place on Jan. 8, was postponed Wednesday night after NASA announced the medical concerns of a crew member that came up on Wednesday afternoon.

NASA has spent the last few weeks getting ready for two spacewalks at the International Space Station (ISS), its first in eight months. But just hours before NASA astronauts Mike Fincke and Zena Cardman were due to begin the first of the two walks on Thursday,

NASA did not identify the crew member or provide details on the medical concern, citing privacy issues in a brief blog post.

NASA astronauts are preparing for two spacewalks to complete tasks outside the International Space Station. Here's what we know about the mission.

NASA has cancelled an ISS spacewalk and is considering ending Crew-11’s mission early due to a medical issue affecting one stable, unnamed crew member. The situation could lead to all four astronauts returning to Earth months ahead of schedule if deemed the safest option.

As NASA prepares to bring Crew-11 home early, here's a look at other medical issues or space emergencies that NASA has overcome.

NASA announced four astronauts with ISS Crew-11 will return home before its expected departure after the agency decided to postpone its first spacewalk of the year outside the International Space Station.

JANUARY 27TH. RIGHT NOW, WE’RE WAITING FOR NASA TO TELL US WHEN IT PLANS TO BRING BACK AN ASTRONAUT FROM THE INTERNATIONAL SPACE STATION IN NEED OF MEDICAL ATTENTION. NASA HAS NOT SAID WHAT SPECIFICALLY IS WRONG, BUT SAYS IT’S SERIOUS ENOUGH TO BRING ...