Live coverage: Japanese cargo craft arrives at space station

Japanese space agency officials said Tuesday they found a “large number” of pitch black rock and dust particles after opening a capsule returned to Earth earlier this month by the Hayabusa 2 mission, giving eager scientists their first significant specimens ever brought back from an asteroid.

Helium leaks and thruster issues prompted NASA to extend their stay aboard the space station indefinitely — Wednesday marked their 35th day in orbit — while engineers carry out tests and analysis to better understand what caused the problems and to make sure the spacecraft can safely being Wilmore and Williams home.

With a robot rather than a cosmonaut in the commander’s seat, a Russian Soyuz spacecraft rocketed into orbit from Kazakhstan late Wednesday (U.S. time) en route to the International Space Station on a critical test flight before crews begin riding an upgraded Soyuz booster next year.