In a groundbreaking discovery, a team led by PRL Ahmedabad has unearthed compelling evidence of ozone on Jupiter’s moon, Callisto. This revelation, part of an international effort including Indian scientists, offers crucial insights into the intricate chemical dynamics occurring on icy celestial bodies within our solar system. Published in the March 2024 edition of the journal Icarus, the study delves into the chemical evolution of “SO2 astrochemical ice,” predominantly comprised of sulfur dioxide (SO2) under ultraviolet irradiation. By unraveling the presence of ozone on Callisto, researchers advance our understanding of planetary processes and expand the realm of possibilities for future exploration and astrochemical studies in our cosmic neighborhood.