Live coverage: Space station crew investigating slow pressure leak

As his year-long mission aboard the International Space Station draws to a close, Expedition 46 commander Scott Kelly of NASA gives a final in-flight news conference with U.S. media on Feb. 25.

A new Russian weather observatory and the first prototype for Telesat’s planned network of 100-plus broadband communications satellites in low Earth orbit were among 19 spacecraft feared lost after a Fregat rocket stage ran into trouble soon after liftoff aboard a Soyuz booster Tuesday.

An Orbital ATK Cygnus cargo craft departed the International Space Station on Wednesday, heading for a higher orbit to deploy 14 CubeSats and an eventual de-orbit burn to dispose of more than 6,200 pounds of trash and other unneeded equipment packed by the station’s crew.