![]() A remote sensing package (JANUS, MAJIS, UVS, SWI) includes imaging and spectral imaging capabilities from the ultraviolet to the sub-millimetre wavelengths.Instruments: Juice will carry 10 state-of-the-art instruments, comprising the most powerful remote sensing, geophysical and in situ payload complement ever flown to the outer Solar System: Each solar panel measures about 2.5 m x 3.5 m with five on each side of the spacecraft deployed as two distinctive cross-shaped arrays, these total an area of about 85 square metres Spacecraft: Three-axis stabilised with 10 solar panels and a 2.5-metre-long High Gain Antenna, with a dry mass of approximately 2400 kg and a wet mass (including fuel) of approximately 6000 kg. Lifetime: Nominal science lifetime of 4 years The spacecraft will go on to spend many months orbiting Jupiter, completing fly-bys of Europa, Ganymede and Callisto, and finally conducting an orbital tour of Ganymede ![]() It will reach Jupiter in July 2031 six months before entering orbit around Jupiter, Juice will begin its nominal science phase. Journey and orbit: Juice will spend approximately eight years cruising to Jupiter, during which it will complete fly-bys of Venus, Earth and the Earth-Moon system. Launch: Juice launched from Europe’s Spaceport in Kourou, French Guiana, on an Ariane 5 launcher on 14 April 2023. NASA has contributed one instrument (UVS) and hardware for two European-provided instruments (RIME and PEP), while JAXA has contributed hardware for various European-provided instruments (SWI, PEP, GALA, RPWI). Under these themes, Juice will explore a) the habitable zone – namely characterising the oceans, icy shells, compositions, surfaces, environments and activity of Ganymede, Europa and Callisto – and b) the wider Jupiter system, characterising Jupiter’s atmosphere, magnetic environment, ring system and other satellites (including Io)ĭevelopment: ESA-led mission. The mission will consider two key themes of ESA’s Cosmic Vision 2015-2025: What are the conditions for planet formation and the emergence of life? and How does the Solar System work? Is the origin of life unique to our planet, or could it occur elsewhere in our Solar System – or beyond? In the Solar System, we know of only one body that has experienced the emergence of life: Earth. ![]() Key question(s): Juice’s overarching theme is the emergence of habitable worlds around gas giants. Mission objectives: Juice will characterise Jupiter’s ocean-bearing icy moons – Ganymede, Europa and Callisto – as planetary objects and possible habitats, explore Jupiter’s complex environment in depth, and study the Jupiter system as an archetype for gas giants across the Universe ![]()
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