Video: Press site view of SpaceX resupply launch (members only)

It’s Steve Clarke’s job to merge the goals of space scientists with NASA’s strategic plans for exploring the solar system, two factors which are not always in lock-step, as the space agency seeks to return humans to the moon, and eventually send astronauts to Mars.

SpaceX sent a Falcon 9 first-stage booster on a record-breaking 19th launch just after midnight as it continues the expansion of its Starlink satellite constellation. Liftoff from pad 40 at Cape Canaveral occurred at 12:33 a.m. EST (0533 UTC).

A United Launch Alliance Atlas 5 rocket launched at 5:02 p.m. EST (2202 GMT) Thursday from Cape Canaveral with NOAA’s GOES-S weather satellite, the second in a series of upgraded observatories destined to cover the western United States and the Pacific Ocean.