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Jupiter Icy Moon Explorer
The Jupiter Icy Moon Explorer (JUICE) is a planned European Space Agency (ESA) spacecraft designed by Airbus Defence and Space to visit the Jovian system, focused on studying three of Jupiter's Galilean moons: Ganymede, Callisto, and Europa (excluding the more volcanically active Io).〔(【引用サイトリンク】title=ESA—Selection of the L1 mission )〕 It will characterise these three worlds, all of which are thought to have significant bodies of liquid water beneath their surfaces, making them potentially habitable environments. The selection of this mission for the L1 launch slot of ESA's Cosmic Vision science programme was announced on May 2, 2012.
==History==
The mission started as a reformulation of the Jupiter Ganymede Orbiter proposal, which was to be ESA's component of the cancelled Europa Jupiter System Mission—Laplace (EJSM-Laplace).〔(JUICE (JUpiter ICy moon Explorer): a European-led mission to the Jupiter system )〕 It became a candidate for the first L-class mission (L1) of the ESA Cosmic Vision Programme, and its selection was announced on May 2, 2012.〔 In April 2012 JUICE was recommended over the proposed ATHENA X-ray telescope and a gravitational wave observatory (New Gravitational wave Observatory (NGO)). In July 2015, Airbus Defence and Space was selected as the Prime Contractor to design and build the probe.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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