Video: Highlights of second Expedition 50 spacewalk

For the second time in less than a week, astronauts will leave their quarters inside the International Space Station on Thursday to outfit a relocated docking adapter to eventually receive Boeing and SpaceX commercial crew capsules.

Space station commander Scott Kelly and flight engineer Kjell Lindgren are gearing up for their second spacewalk in nine days Friday, a planned six-and-a-half-hour excursion to reconfigure the ammonia cooling system used by one of the lab’s sets of solar arrays.

Japan’s sixth automated logistics vehicle packed with 4.5 tons of supplies approached the International Space Station for a laser-guided rendezvous, culminating with grapple of the HTV cargo craft by the station’s robotic arm at 1037 GMT (5:37 a.m. EST) Tuesday.