Rosetta was a space probe launched by the European Space Agency (ESA) in 2004 with the primary mission to study Comet 67P/Churyumov–Gerasimenko. It was a pioneering mission, aiming to orbit and land on a comet for the first time in history. Rosetta's mission officially ended on September 30, 2016, when it was deliberately crashed into Comet 67P to study the comet's surface up close during its final descent. The mission was hailed as a historic success, greatly expanding our understanding of cometary science and the early solar system.