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

A barge and command ship chartered by SpaceX are stationed in the Atlantic Ocean off Florida’s East Coast in a bid to recover a used-up Falcon 9 rocket stage Tuesday in a long-theorized — but never tried — maneuver that could lay the groundwork for a big advance in space technology.

The Atlas 5 rocket emerges from the Vertical Integration Facility for rollout to Complex 41 at Cape Canaveral in preparation to launch Morelos 3 on Friday at 6:08 a.m. EDT.

Little has been said officially about the satellites, which have been described as part of the agency’s “proliferated architecture.” Liftoff happened at the opening of the launch window at 1 a.m. PDT (4 a.m. EDT, 0800 UTC).