Live coverage: Japanese navigation satellite launches on H-2A rocket

Flight controllers at NASA’s mission control center in Houston have completed the robotic swap out of a failed power distribution unit outside the International Space Station, clearing a hurdle ahead of Friday’s predawn launch from Cape Canaveral of a SpaceX supply ship.

An upgraded Soyuz spacecraft, featuring improved navigation, communications and rendezvous systems, blasted into orbit from Kazakhstan Wednesday and set off on a two-day maiden flight to deliver three fresh crew members to the International Space Station.

Weeks after the launch of an earlier trio of Chinese military satellites, another spacecraft triplet successfully took off Feb. 24 aboard a Long March 4C rocket on a clandestine mission that analysts believe may involve spying on foreign naval forces.