Next stop in the search for extraterrestrial life, Jupiter's icy moons, Ganymede, Calisto and Europa. In 2023, the Jupiter icy moons explorer, Juice, will leave Earth heading towards Jupiter. After a seven-year journey, it will enter the Jovian system and start exploring the three moons during close flybys. Juice then will orbit its primary target, Ganymede. At one and a half times the size of Earth's moon, Ganymede is the largest moon in the solar system. There is evidence that Ganymede harbors an ocean, deep beneath its 150-kilometer thick ice crust. Moreover, the gravitational interactions with Jupiter provide energy in the form of heat, a necessary condition for the emergence of life. Calisto is also covered with a thick ice crust, yet it is uncertain whether an ocean lies underneath. The moon's heavily cratered appearance suggests that no geological activity has ever reshaped its surface. Europa's surface is much younger and is constantly being reshaped by tectonic activity. Its ice crust is also much thinner, barely more than 15 kilometers thick, and the vast ocean beneath contains presumably more water than all the Earth's oceans combined. The resemblance of these subsurface oceans to Earth's deep sea environment suggests that they can be habitable for microbial life. Europa is widely considered the most promising place to search for life beyond Earth. Juice will investigate the atmospheres, surfaces, and interiors of the three moons. The University of Bern provides the NIM, neutral ion mass spectrometer, an instrument designed to measure the chemical composition of the atmospheres. Passing Europa, juice will try to sample ocean water erupting from cracks in the ice crust and analyze it for organic molecules that may indicate the presence of life. This mission may prove to be a giant leap towards answering the question of whether life beyond Earth exists after all. To learn more about juice and NIM, visit the website, juice.space.unib.ch