Live video of the docking of a Progress cargo ship with the space station

Five days after work to replace the grapple fitting on one end of the space station’s robot arm, commander Randy Bresnik and flight engineer Mark Vande Hei ventured back outside the lab complex Tuesday to lubricate the new arm mechanism, to replace a degraded camera and to carry out a variety of lower-priority chores.

NASA has ordered a second commercial crew ferry ship from SpaceX, NASA announced Friday, as the agency continues its on-going push to develop U.S.-built spacecraft to carry astronauts to and from the International Space Station, ending sole reliance on Russian Soyuz vehicles.

Japan’s eighth robotic resupply mission to the International Space Station arrived at its destination Saturday, delivering six fresh lithium-ion batteries, science experiments, CubeSats and other gear to the research outpost.