Juice fuelled for launch
ESA’s Jupiter Icy Moons Explorer (Juice) being fuelled inside the payload preparation facility at Europe’s Spaceport in French Guiana ahead of its launch on an Ariane 5 on 13 April.
Juice will use this propellant to make critical course manoeuvres on its journey to and around the Jupiter system, and to go into orbit around Jupiter then its largest moon, Ganymede. Juice has a bi-propellant chemical propulsion system, using mono-methyl hydrazine (MMH) fuel and mixed oxides of nitrogen (MON) oxidiser. This results in a propellant that spontaneously ignites when the two come into contact with each other.
Fuelling any satellite is a particularly delicate operation requiring setup of the equipment and connections, fuelling, and then pressurisation. The propellants are extremely toxic so only a few specialists wearing protective Self-Contained Atmospheric Protective Ensemble, or ‘scape’ suits, remained in the dedicated hall for fuelling.
Juice is humankind’s next bold mission to the outer Solar System. It will make detailed observations of gas giant Jupiter and its three large ocean-bearing moons: Ganymede, Callisto and Europa. This ambitious mission will characterise these moons with a powerful suite of remote sensing, geophysical and in situ instruments to discover more about these compelling destinations as potential habitats for past or present life. Juice will monitor Jupiter’s complex magnetic, radiation and plasma environment in depth and its interplay with the moons, studying the Jupiter system as an archetype for gas giant systems across the Universe.
