Europe has just completed the first successful hot-fire test of its reusable Prometheus engine integrated with the Themis first-stage demonstrator at the ArianeGroup site in Vernon, France. The hot-fire test consisted of Prometheus performing a 12-second burn on the Themis demonstrator on June 22, 2023.
The two components are part of a broader European launch program, called Ariane Next, which is focused on developing a fleet of reusable rockets that will enter into service in the 2030s. The program is a joint effort between the European Space Agency (ESA) and the French Space Agency (CNES) with ArianeGroup as the prime contractor.