👉Juno Discovers Largest Volcanic Eruption on Io NASA's Juno spacecraft has captured the most significant volcanic eruption ever witnessed on Io, one of Jupiter's moons and the most volcanically active place in our solar system. This enormous eruption covered a vast area of Io’s surface with lava and debris, showcasing the powerful forces shaping the moon. Scientists believe that the immense gravitational pull from Jupiter causes tidal stresses on Io, generating enough heat to trigger these viol