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

SpaceX’s Cargo Dragon spacecraft docked to the International Space Station to begin a one-month stay at the orbiting outpost. Dragon launched atop a Falcon 9 rocket from NASA’s Kennedy Space Center at 9:29 p.m. EST (0229 UTC) for the Commercial Resupply Services 31 (CRS-31) mission.

The first of two launches by SpaceX this week lifted off Monday, Dec. 3, from Vandenberg Air Force Base in California carrying 64 microsatellites and CubeSats to an orbit more than 350 miles (575 kilometers) above Earth.

Former astronaut Al Worden, who orbited the moon and performed the first spacewalk in deep space in 1971, died Wednesday in Texas. He was 88.