"Europe's Ariane 6 Rocket Prepares for First Flight with Nighttime Rehearsal"

The development of a low-cost, reusable engine for European rockets, called Prometheus, has made significant progress with successful tests including full ignition and a 30-second burn with re-ignition. The engine, which burns liquid oxygen-liquid methane fuel, aims to enable reusability and reduce ground operation costs. Further testing will be conducted with two additional prototypes, and a modified test bed for liquid methane fuel will be installed in Germany. The engine is being developed in parallel with a reusable rocket stage called Themis, which is also undergoing testing.