On 15 September, having expended the last of its rocket propellant, NASA’s Cassini probe was deliberately crashed into Saturn following an epic two-decade-long journey of exploration. The mission has revolutionised our understanding of the complex Saturn system, in particular its moons and rings, and broadened our knowledge about life in the solar system. The first spacecraft to orbit Saturn, Cassini has led to hundreds of scientific papers and shaped the future of planetary exploration.