Four astronauts from the International Space Station (ISS) came back to Earth on Sunday in what was the first nighttime splashdown by a U.S. crew since the Apollo moonshot in 1968.

Six months ago, Elon Musk’s SpaceX launched four astronauts—Americans Mike Hopkins, Victor Glover, Shannon Walker along with Soichi Noguchi, from Japan’s space agency—into space aboard a Crew Dragon capsule, named Resilience, on a Falcon 9 rocket from NASA’s Kennedy Space Center at Cape Canaveral in Florida.

After a journey lasting over six hours, they returned this weekend in the same capsule, which parachuted into the Gulf of Mexico off the coast of Panama City, Florida at 2.56 a.m. ET. It marked the end of what SpaceX said was its “first six-month operational mission” to the ISS.