Live coverage: All systems go for launch after final Crew Dragon readiness review

SpaceX will perform a multi-hour experiment on the second stage of a Falcon 9 rocket after the launcher deploys a Dragon supply ship on the way to the International Space Station Thursday, gathering thermal data and other information to verify the vehicle’s ability to perform long-duration missions and inject payloads into demanding, high-energy orbits.

SpaceX’s launch team ran through a traditional preflight test Monday, putting a Falcon 9 rocket through a mock countdown, loading it with propellant and briefly firing its nine engines on a launch pad in California ahead of this weekend’s liftoff with a U.S.-European oceanography satellite.

NASA has declared assembly complete on the core stage for the first Space Launch System heavy-lift rocket in New Orleans, signaling a long-awaited transition from manufacturing to testing as the core stage is set to move to the nearby Stennis Space Center in Mississippi for a hold-down firing next year of its four shuttle-era main engines.