The European Space Agency’s JUICE is a flagship orbiter designed to *sound and map* the hidden oceans of Jupiter’s icy moons using ice-penetrating radar, laser altimetry, gravimetry, and magnetic measurements, while cameras and spectrometers chart geology and surface chemistry during dozens of flybys before the first-ever long orbit of Ganymede - wikipedia 
Optimistically, JUICE could tightly constrain ocean depths and salinity, show that Ganymede’s ocean contacts rocky seafloor, spot fresh salts and organics along young fractures, catch transient water-vapor activity at Europa, and pinpoint prime future landing zones where ocean–surface exchange has been recent.
# Full Tour Summary - **Total time (Jupiter orbit insertion → end of mission):** 1,259 days - **Total propulsive Δv:** 1,696 m/s (3,790 mph) - **Destinations**: detailed tours of Ganymede, Callisto, and Europa; final orbit around Ganymede. - **Launched**: **14 Apr 2023**; gravity-assist cruise via the Moon/Earth and Venus. - **Goal**: characterize the oceans and habitability of Jupiter’s icy moons and their environments.
# See - Europa Clipper