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

A Russian Soyuz spacecraft carrying two cosmonauts and a veteran NASA astronaut blasted off from Kazakhstan Friday, chased down the International Space Station and glided to a smooth automated docking, boosting the lab’s crew back to six.

SpaceX launched a Falcon 9 rocket from Cape Canaveral at 4:10 p.m. EDT (2010 GMT) Tuesday on the company’s first mission dedicated to the newly-established U.S. Space Force. The Falcon 9 carried a GPS navigation satellite into orbit.

A SpaceX Falcon 9 rocket ignited its nine kerosene-fueled Merlin engines on the launch pad at Cape Canaveral on Tuesday evening in a critical milestone before liftoff with a commercial Thai communications satellite later in the week.