Nebular research involves the study of nebulae, which are large clouds of gas and dust in outer space. Nebulae are often regions where stars are born, and studying them can provide valuable insights into the formation and evolution of stars and galaxies. Researchers in this area use a variety of observational tools and theoretical models to study the physical properties, chemical composition, and dynamics of nebulae. They may also investigate the role of nebulae in the cycle of stellar birth and death, as well as their impact on the overall structure and evolution of galaxies.