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

SpaceX’s next Falcon 9 rocket arrived at launch pad 39A Thursday for a customary hold-down engine firing. Liftoff from Florida’s Space Coast is targeted for Sunday, weather permitting.

Track the progress of the Soyuz MS-01 spacecraft and its three-person crew through Wednesday’s countdown and launch, followed two days later by docking with the International Space Station on Friday.

Officials expect to delay next year’s launch of a European Mars orbiter and lander about two months — from January to March — to remove faulty pressure transducers from the landing craft’s braking system, the European Space Agency announced Friday.