Massive stars are stars that have a mass several times greater than that of the Sun. These stars play a crucial role in the universe as they are responsible for producing heavy elements through nuclear fusion in their cores and for enriching the interstellar medium with these elements when they explode as supernovae at the end of their lives. Research on massive stars focuses on understanding their formation, evolution, and eventual fate. Scientists study the physical processes that govern the behavior of massive stars, such as their structure, mass loss, and the impact of rotation on their evolution. They also investigate the role of massive stars in the formation of galaxies, the influence of massive stars on their environment, and their impact on the evolution of the universe as a whole. Overall, research on massive stars is important for advancing our understanding of the universe and the processes that shape it.