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

SpaceX called off a Falcon 9 countdown Wednesday due to the threat of lightning from thunderstorms along Florida’s Space Coast, pushing back the departure of a cargo mission for the International Space Station until Thursday.

The run-through simulated day-of-launch activities, included suit up, ingress into the Orion spacecraft and a countdown that stopped just shy of T-0.

Fifty years to the day after Neil Armstrong stepped onto the surface of the moon, a NASA astronaut, an Italian flight engineer and a Russian commander geared up for launch aboard a Soyuz spacecraft Saturday on a six-hour flight to the International Space Station.