Astronaut Shane Kimbrough and his two Russian crewmates — Soyuz MS-02 commander Sergey Ryzhikov and flight engineer Andrey Borisenko — undocked from the International Space Station and plunged back to Earth Monday, landing on the steppe of Kazakhstan to close out an extended 173-day mission.

Outgoing space station commander Randy Bresnik, joined by Russian cosmonaut Sergey Ryazanskiy and European Space Agency flight engineer Paolo Nespoli, returned to Earth early Thursday after nearly five months in orbit. Their Soyuz MS-05 capsule undocked from the International Space Station at 12:14 a.m. EST (0514 GMT), and landed on the steppe of Kazakhstan at 3:37 a.m. EST (0837 GMT).

SpaceX’s next Falcon 9 rocket is being readied for liftoff Aug. 14 on a space station resupply run. The two-stage rocket completed a hold-down engine firing Thursday at launch pad 39A at NASA’s Kennedy Space Center in Florida.