The European Space Agency has reserved an Ariane launcher to send a spacecraft toward Jupiter in May 2022, and the mission’s project manager said Tuesday officials could assign the probe to Europe’s new Ariane 6 rocket, assuming the vehicle has a successful debut by the end of 2020.

Near the end of a ground-shaking test firing of Northrop Grumman’s solid-propellant Castor 600 rocket motor — the first stage of a new booster being designed to launch spy satellites and other national security payloads — a major part of the rocket’s big nozzle appeared to break apart, littering the test site with shards of debris.

SpaceX launch crews rolled out the company’s next Falcon 9 rocket to pad 39A at the Kennedy Space Center in Florida, then lifted the two-stage launcher vertical for a hold-down engine firing Thursday in preparation for launch next week with a South Korean-owned commercial communications satellite.