The European Space Agency’s next-generation heavy-lift rocket Ariane 6 successfully completed a full dress rehearsal on Thursday, in preparation for its maiden flight next year. The so-called hot-fire test at Europe’s Spaceport in French Guiana “simulated a complete launch sequence and thus validated the entire flight phase of Ariane 6’s core stage,” said the agency.   During the rehearsal, the rocket engine was ignited while securely mounted to a test stand or test platform. The term ‘hot-fire’ refers to the fact that the engine is fired with its propellants, producing actual combustion and exhaust. The only difference from an actual launch…

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