Cygnus OA-6: What’s onboard?

A Soyuz rocket with a three-person crew heading for the International Space Station lifted off at 1357 GMT (9:57 a.m. EDT) Wednesday in the final launch currently scheduled from Gagarin’s Start, a historic site at the Baikonur Cosmodrome in Kazakhstan from where Yuri Gagarin departed on the first human spaceflight in 1961. Beginning next year, Soyuz crews will blast off from a different pad at Baikonur.

Space station commander Jeff Williams and astronaut Kate Rubins plan to carry out their second spacewalk in two weeks Thursday, venturing back outside to retract a cooling radiator, install a high-definition TV camera, replace a burned-out light and inspect struts attached to a large solar array rotary mechanism.

Northrop Grumman’s Antares rocket will deliver a Cygnus supply ship into orbit Saturday to begin a pursuit of the International Space Station.