The Many Moons of Jupiter Galileo published his discovery of the first 4 moons in 1610. That number stayed stubbornly at 4 until 1892 when a 5th was discovered by Edward Emerson Barnard, known better for Barnard’s Star. Since the 1900’s many more have been discovered as telescopes improved. The minor moons, as the 88 non-Galilean ones are known, are generally much smaller, having radii of only a few kilometers. This visualization shows 5 years (in the future) of the minor moons in orbit around J

How do you imagine life around Jupiter? 🦠🪱🐟 Determining whether the Jovian moons provide the right conditions for habitability is one of the Jupiter Icy Moons Explorer, Juice, core objectives. Could life have appeared somewhere there? Do any of the Galilean moons have the building blocks needed for life? By studying the Galilean moons’ hidden oceans, magnetism, heating processes, tidal effects, orbits, surface activity, cores and compositions, atmospheres and space environments, Juice will in