ESA’s Euclid gets fuelled inside an Astrotech facility near Cape Canaveral in Florida (USA) ahead of its launch on a SpaceX Falcon 9 this summer.
The Euclid spacecraft is supplied with two types of propellant: hydrazine and gaseous nitrogen. Ten hydrazine thrusters will provide chemical propulsion to complete the journey to Sun-Earth Lagrange point L2, perform monthly manoeuvres to stay in orbit, and dispose of the spacecraft at the end of the mission’s life. 140 kg of hydrazine are stored in one central tank. Fuelling the spacecraft is a delicate operation because the hydrazine fuel is highly toxic. The task has to be carried out by experts who each wear a self-contained atmospheric protective ensemble, or ‘scape’ suit.