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

The NROL-57 mission was the eighth launch supporting the National Reconnaissance Office’s proliferated architecture satellite constellation. Liftoff happened at 11:49 p.m. PDT (2:49 a.m. EDT, 0649 UTC).

An upgraded model of SpaceX’s Falcon 9 rocket fired into orbit early Sunday from Florida’s Space Coast, hoisting a record-setting 7.8-ton communications satellite for Telesat toward its planned perch more than 22,000 miles over the equator.

SpaceX kicked off its 2019 launch campaign with a mission Friday from Vandenberg Air Force Base in California carrying 10 more upgraded communications satellites into orbit to complete a refresh of Iridium’s voice and data relay network. Liftoff of the Falcon 9 rocket occurred at 7:31 a.m. PST (10:31 a.m. EST; 1531 GMT).