NASA astronaut Frank Rubio is back on solid ground today after an American record-breaking 371 days in space aboard the International Space Station.

Rubio landed safely in Kazakhstan along with Roscosmos cosmonauts Sergey Prokopyev and Dmitri Petelin at 2:43 a.m. CDT. He had flown to the station with the same two Russian astronauts on Sept. 21, 2022 on what was his first spaceflight.

“Frank’s record-breaking time in space is not just a milestone; it’s a major contribution to our understanding of long-duration space missions,” NASA Administrator Bill Nelson said. “Our astronauts make extraordinary sacrifices away from their homes and loved ones to further discovery. NASA is immensely grateful for Frank’s dedicated service to our nation and the invaluable scientific contributions he made on the International Space Station. He embodies the true pioneer spirit that will pave the way for future exploration to the Moon, Mars, and beyond.”

Rubio’s flight yielded some amazing numbers: 157 million miles traveled, 5,936 orbits and the equivalent of 328 trips to the moon and back, NASA said. He saw 15 spacecraft arrive at the station and 14 depart. A single Soyuz capsule remains.

During the mission, he conducted hours of research in topics including plant research and physical sciences. One of those studies was bio-printing knee cartilage tissue. Scientists on Earth will evaluate the result and see if it advances the in-space manufacturing of human organs for transplants.

Rubio, a board-certified family physician, flight surgeon and former Blackhawk helicopter pilot with more than 600 hours of flight in deployments to Bosnia, Afghanistan and Iraq, is heading back to his home in Houston where his wife, Deborah Rubio, and four children await his arrival.