237 Days in Orbit, and Europe Has a New Record Holder

Sophie Adenot is back on Earth after 237 days in space, the longest single flight by a European astronaut, and scientists now want to know what it did to her body.

The European Space Agency (ESA) said Adenot spent 237 days, five hours and 18 minutes in space and completed more than 3,700 orbits of the planet. ^[1][2] That works out at roughly 15 or 16 laps of the Earth every day. It beats the previous European record, held by Luca Parmitano, by more than 35 days. ^[2][3]

She came home with Crew-12, a four-person NASA and SpaceX crew. The capsule undocked from the International Space Station on October 7 and splashed down off California at 15:34 GMT on October 8. ^[2][3] Adenot reached ESA's European Astronaut Centre in Cologne at 04:21 GMT on October 10. ^[2]

The record is the headline. The science is what happens next, and ESA has not yet reported any results from her post-flight measurements.

The road home

The trip from the station to the sea took 27 hours and 29 minutes. ^[2][3] A recovery team reached the capsule within minutes of splashdown and brought it aboard a recovery ship, where Adenot had her first medical checks. ^[3] She then travelled through Houston before the flight to Cologne. ^[2]

Adenot and her crewmate Jack Hathaway were both on their first spaceflight, according to NASA. ^[4] A first flight that lasted nearly eight months is an unusual way to begin.

What she did up there

Adenot worked outside the station as well as in it. She completed three spacewalks in 14 days, spending 19 hours and 42 minutes outside. ^[2][3] That makes her the first French woman to walk in space and the second European woman to do so. ^[2][3] NASA counts four spacewalks for the crew as a whole. ^[4]

Inside, ESA says she logged about 218 hours on 35 European experiments and about 25 hours maintaining or upgrading ESA systems in the Columbus laboratory, the European research module of the station. ^[2] The work spanned health research, materials science, biology, fluid physics, radiation physics and fundamental science. ^[2]

She completed all the epsilon-specific experiments proposed by France's space agency CNES, and every ESA experiment assigned to her. ^[2] Add the 218 hours of experiments to the 25 hours of maintenance and the 19 hours and 42 minutes of spacewalking, and it is a working mission, not a long ride.

Two tests looked ahead to longer journeys. One was the European Enhanced Exploration Exercise Device, or E4D, which ESA describes as a compact, versatile exercise system meant to support future human exploration. The other was metal 3D printing in orbit. ^[2][7] ESA's pre-mission plan also listed experiments on crew health and autonomy, and educational work with students. ^[7]

Exercise gear and a printer that makes metal parts are not glamorous. They are the kind of equipment a crew would want on a trip where nobody can pop back to the shops, or to a hospital.

The body's bill

On Earth, bones and muscles work against the body's own weight all day. In orbit that load disappears, and the body adjusts to the new arrangement. Coming back means readjusting to the old one.

NASA names bone loss as a concern on long missions. Its background on a bone-loss investigation aboard the station says astronauts can lose bone density even with exercise, and that researchers are studying the cellular mechanisms behind it and ways to prevent it. ^[6] That is general research context, not a result from Adenot's flight.

The stakes grow with distance. NASA's own research background points out that on missions far from Earth, an emergency return may not be available, which makes protecting crew health a hard requirement. ^[6]

Adenot's 237 days are a long stretch by European standards, and her recovery will be watched closely. One astronaut's measurements will not settle how people cope with months in space. They will add to the evidence.

The next three weeks

Adenot will now spend two to three weeks adjusting to Earth's gravity and giving data at :envihab, a German Aerospace Center (DLR) facility beside the European Astronaut Centre. ^[2][5] ESA says she will then continue rehabilitation and follow-up with the centre's training team. ^[2]

The agency has not said which measurements will be taken at :envihab or which will be made public. It has also not said how long the follow-up will last. Nor has it reported results from her science payloads or from the E4D and metal-printing tests.

Those answers decide what the record is worth. A flight of 237 days shows that a European can do the job. The data from her recovery, and from the experiments she ran, will show what the job costs.

The next step is the one at :envihab, where Adenot has two to three weeks of testing before the longer work of rehabilitation begins. ^[2][5]