NASA’s Crew-12 returns after 237 days, with science briefing next

NASA’s SpaceX Crew-12 returned to Earth on October 8, 2026, splashing down in the Pacific Ocean off Los Angeles after a 237-day mission that included research into astronaut health and medical technologies. NASA said the four astronauts landed safely at 8:34 a.m. PDT, or 15:34 UTC, aboard Crew Dragon Freedom.

The returning crew comprised NASA astronauts Jessica Meir and Jack Hathaway, European Space Agency astronaut Sophie Adenot and Roscosmos cosmonaut Andrey Fedyaev. SpaceX recovery teams retrieved the spacecraft and its occupants shortly afterward, according to NASA’s return announcement.

NASA has scheduled an October 15 news conference at Johnson Space Center in Houston to discuss the crew’s science mission. Its landing announcement describes hundreds of hours of research, but does not provide quantitative experimental results or establish that the work has delivered clinical benefits.

Crew-12’s return and spacewalking milestones

NASA reported that the crew travelled more than 100 million miles and completed more than 3,792 orbits around Earth. This was the second space mission for Meir and Fedyaev and the first for Hathaway and Adenot, bringing together experienced space travellers and two astronauts completing their first flights.

The agency outlined standard postflight medical screenings, followed by a flight to shore and a return to Houston. Those were the next recovery steps described in the announcement; it did not confirm that the onward transfers had already finished or disclose individual medical results.

What science Crew-12 carried out

The crew tested stem-cell production for potential cell-based therapies and demonstrated the generation of intravenous fluids on demand for future missions. NASA presented these as research and demonstration activities. It did not announce an approved treatment or establish that the fluid-generation technology was ready for routine operational use.

Other work examined how bacteria that cause pneumonia can lead to long-term heart damage. The astronauts also conducted nutrition research and investigated how physical characteristics may affect blood flow during spaceflight. NASA connects those investigations to efforts to protect astronauts’ health on future missions beyond low Earth orbit.

The European contribution had its own research programme. At the start of Adenot’s εpsilon mission, ESA planned up to 36 European experiments, including seven developed by France’s space agency, CNES. Adenot was assigned specialist duties for both Europe’s Columbus laboratory and Japan’s Kibo module.

Those figures describe the programme planned at the beginning of the flight, rather than a final count of completed experiments. Neither agency’s account establishes a final experiment inventory, peer-reviewed findings or quantified technological improvements. The reported activities therefore show what the astronauts worked on, while their eventual benefits remain to be demonstrated.

European teams supported the work from Earth

ESA’s mission-start account recorded launch from Kennedy Space Center in Florida on February 13 at 10:15 UTC, followed by docking on February 14 at 20:15 UTC. The approximately 34-hour journey ended with the start of Adenot’s εpsilon mission aboard the International Space Station.

In July, ESA described the ground network supporting that work. Flight controllers at the Columbus Control Centre near Munich operated around the clock, coordinating European laboratory activities with international partners. Their planning covered experiments and maintenance alongside exercise and meals, helping align astronaut time with equipment and support resources.

EUROCOM, based at the European Astronaut Centre in Cologne, provided a coordinated communication channel between astronauts and engineers, scientists, flight controllers and medical personnel. ESA’s European Crew Operations Support team also helped turn research concepts into activities astronauts could perform in space.

October 15 briefing will discuss the science mission

The Houston news conference is scheduled for 3:30 p.m. EDT, or 19:30 UTC, on October 15. NASA named Meir, Hathaway and Fedyaev as available participants. Adenot will return to Europe and will not be available for that event, the agency said.

The briefing is still ahead, so its findings cannot yet be reported. NASA’s return announcement establishes the completed flight and outlines the research undertaken; it leaves the scientific outcomes and a final accounting of the experiments open.