Q&A with NASA Administrator Jim Bridenstine (members only)

Working overnight on Florida’s Space Coast, SpaceX technicians transferred a two-stage Falcon 9 rocket from the company’s commercial hangar a quarter-mile up the ramp to launch pad 39A early Saturday, positioning the kerosene-fueled booster for liftoff Sunday with a classified payload for the U.S. government’s National Reconnaissance Office.

The mission came as SpaceX is preparing to launch a Dragon spacecraft to the International Space Station later this week. Liftoff of the Starlink 7-16 mission happened at 7:28 p.m. PT (10:28 p.m. ET, 0228 UTC).

Ground controllers are running Europe’s ExoMars orbiter through a post-launch checkup a week after its successful liftoff aboard a Proton rocket, and a first look at the probe’s systems has revealed no problems, the mission’s flight director said Tuesday.