Live coverage: Cygnus supply ship readied for station departure

Two key pieces of hardware needed for NASA’s next Mars rover — an Atlas rocket booster and sterile components of the rover’s sample collection system — recently arrived at Cape Canaveral ahead of the mission’s scheduled launch July 17.

In a brief ceremony Saturday, veteran cosmonaut Gennadi Padalka, the most experienced spaceman on or off the planet, turned over command of the International Space Station to NASA astronaut Scott Kelly, who along with cosmonaut Mikhail Kornienko is midway through a nearly yearlong stay in orbit.

Two software errors detected after launch of a Boeing Starliner crew ship during an unpiloted test flight last December, one of which prevented a planned docking with the International Space Station, could have led to catastrophic failures had they not been caught and corrected in time, NASA said Friday.