ESA's Juice mission is dedicated to exploring Jupiter’s giant icy moons—Ganymede, Callisto, and Europa—as planetary habitats and potential ocean worlds. In late 2034, Juice will make history by entering permanent orbit around Ganymede, becoming the first spacecraft ever to orbit a moon other than our own.
| Sensor | Subsystem | Scientific Measurement Function | State |
|---|---|---|---|
| JANUS | Optical Camera System |
High-resolution panchromatic and color imaging of icy moon geology.
|
Tested |
| MAJIS | Moons and Jupiter Imaging Spectrometer |
Tropospheric cloud mapping and surface ice mineralogy.
|
Tested |
| RIME | Radar for Icy Moons Exploration |
Subsurface radar sounding ice crusts down to 9 km depth.
|
Tested |
| GALA | Ganymede Laser Altimeter |
Measures tidal surface flexing to calculate internal ocean depth.
|
Standby |
| J-MAG | Juice Magnetometer |
Detects subsurface induced magnetic fields in Ganymede and Europa oceans.
|
Active |