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

The second set of Iridium’s next-generation satellites to launch on a SpaceX Falcon 9 rocket were prepared for liftoff inside a climate-controlled clean room at Vandenberg Air Force Base over the last few weeks.

The U.S. Air Force has released an infrared video and additional images from Sunday’s landing of the military’s X-37B spaceplane in Florida after a top secret mission that lasted more than two years.

A logistics-delivery vessel for the International Space Station, launched and operated privately by commercial companies on behalf of NASA, is scheduled to arrive at the lab complex Saturday at 6:05 a.m. EDT (1005 GMT).