Watch the Falcon 9 launch from pad 39A

The Starlink 9-17 mission featured the 350th booster landing to date. Liftoff happened at 6:50 a.m. PDT (9:50 a.m. EDT, 1350 UTC).

These narrated videos show the pre-launch preparations that readied the United Launch Alliance Atlas 5 rocket and the Orbital ATK Cygnus commercial cargo-delivery spacecraft for flight and rolling to Complex 41 for liftoff to the International Space Station.

An early test model of SpaceX’s Starship vehicle, which billionaire entrepreneur Elon Musk says will carry people and cargo to the moon and Mars, briefly left the ground on its first untethered test flight Thursday night powered by the company’s new methane-fueled Raptor engine.