Live coverage: 400th Proton rocket takes off with Russian satellite

Two U.S. astronauts flanked a veteran Russian cosmonaut Thursday for a ride back to Earth from the International Space Station. The trio undocked from the station in their Soyuz spacecraft at 0757 GMT (3:57 a.m. EDT), beginning a return flight that culminated in a parachute-assisted landing on the steppe of Kazakhstan at 1145 GMT (7:45 a.m. EDT).

SpaceX test-fired a previously-flown Falcon 9 rocket Monday evening on pad 39A at NASA’s Kennedy Space Center in Florida, setting the stage for a launch later this week carrying the Japanese-built, Qatari-owned Es’hail 2 communications satellite to orbit.

Boosted off planet Earth by a Russian Proton rocket, a European-built space probe departed for Mars on Monday, beginning a mission to test future landing technologies and search for methane, a potential signature of microbial life.