Ganymede flyby
Ganymede flyby
One of the main goals of the JUICE mission is to study Jupiter's moon Ganymede from a close orbit in the final stage of the mission. DLR's Ganymede Laser Altimeter (GALA) instrument will play an important role in this. With its highly accurate topographic measurements, it will show whether the crust periodically rises and falls by up to six metres as the moon orbits Jupiter, or only by less than one metre. The former would be confirmation of the existence of an ocean under the ice.
