The launch of the probe was postponed by one day due to the influence of the weather, and at 1:14 p.m. on the 9th, Japan time, it was launched from French Guiana on the European rocket "Ariane 14" The spacecraft will now observe three of Jupiter's orbiting moons, Europa, Ganymede, and Callisto, whose surfaces are covered with ice.
The purpose is to investigate whether there are places such as the "ocean" and organic matter inside the moon that are necessary for life to exist on Earth.