Q&A with Keith Gendreau, principal investigator of the first X-ray space communications experiment (members only)

A team of United Launch Alliance and NASA engineers worked through Delta 2 launch day fueling procedures during a simulated countdown Wednesday for what should be the second-to-last time before the venerable rocket’s final liftoff next month from California’s Central Coast.

A Northrop Grumman Cygnus supply ship rocketed into orbit from Virginia Friday night on an Antares launcher, taking aim on the International Space Station with an advanced $23 million zero-gravity titanium toilet and several tons of other gear.

Catching a break from nearby thunderstorms, a SpaceX Falcon 9 rocket soared through mostly cloudy skies into space Saturday on the 100th launch from historic pad 39A in Florida, sending a fresh batch of supplies and experiments to the International Space Station.