Watch the Falcon 9 launch from pad 39A

The head of the Russian space agency said this week that the the Gateway mini-space station NASA plans to build around the moon is “too U.S.-centric” and added that Russia unlikely to significantly contribute to the project.

With three space station fliers heading home Sunday after a 168-day mission, three fresh crew members made final preparations for launch three days later to boost the lab’s crew back to six in a rapid-fire rotation that will prevent any major interruption of research activity.

A logistics-delivery vessel for the International Space Station, launched and operated privately by commercial companies on behalf of NASA, is scheduled to arrive at the lab complex Saturday at 6:05 a.m. EDT (1005 GMT).