NASA astronauts Bob Behnken and Doug Hurley are headed back to Earth after a two-month mission at the International Space Station, marking the first time a privately owned craft will return astronauts from the space station to Earth.
The crew departed the space station Saturday afternoon aboard SpaceX’s Crew Dragon capsule, the same craft that brought them to space in that vessel’s first crewed flight. After leak checks, the astronauts lowered the visors of their helmets, and a command to undock was sent to the spacecraft at 7:30 p.m. Eastern time.
Two sets of hooks were disconnected, and then the capsule started to float slowly away from the space station around 7:35 p.m. Eastern time. Several engine thrusters fired to further separate the spacecraft from the space station.
The last major test for the capsule will come Sunday, when it is set to splash down at 2:41 p.m. Eastern time in the Gulf of Mexico, near Pensacola, Fla.
There were seven possible landing sites along the Florida coast; three in the Atlantic Ocean were in the path of Tropical Storm Isaias.
The splash-down will mark the first time in 45 years that astronauts have returned to space via an ocean landing.
The last such landing came in July 1975, when an Apollo capsule splashed down in the Pacific Ocean during the Apollo-Soyuz Test Program mission.
Since then, spacecraft have made landings on terra firma — the space shuttle landed on a runway, and the Russian Soyuz capsule lands in Kazakhstan.
A successful Sunday splash-down would cap off a test mission that has so far gone well for Hawthorne-based SpaceX.
The Elon Musk-led company developed its Crew Dragon capsule under a NASA contract with the intent of one day ferrying NASA astronauts regularly to the space station. Aerospace stalwart Boeing Co. is also developing its own Starliner capsule under a NASA contract for this purpose.