Video: Falcon 9 launch of DSCOVR

Fifty years to the day after Neil Armstrong stepped onto the surface of the moon, a NASA astronaut, an Italian flight engineer and a Russian commander geared up for launch aboard a Soyuz spacecraft Saturday on a six-hour flight to the International Space Station.

SpaceX conducted its first launch from Florida in more than two months Thursday, when a Falcon 9 rocket lifted off from the Kennedy Space Center with the Qatari Es’hail 2 communications satellite at 3:46 p.m. EST (2046 GMT). The Falcon 9’s reused first stage landed on SpaceX’s drone ship in the Atlantic Ocean.

China’s first X-ray astronomy satellite launched Thursday on a mission to survey the Milky Way galaxy for black holes and pulsars, the remnants left behind after a star burns up its nuclear fuel.