Pulsating stars are a type of variable star that exhibit periodic changes in their brightness. These changes are typically caused by fluctuations in the star's internal structure, which result in periodic expansions and contractions of the star's outer layers. Pulsating stars are important objects of study in astrophysics because their periods of variability can provide valuable information about the star's mass, age, and evolutionary stage. By studying the properties of pulsating stars, astronomers can gain insights into the physical processes that govern stellar evolution and the structure of stars. Some common types of pulsating stars include Cepheid variables, RR Lyrae variables, and Delta Scuti variables. These stars are often used as standard candles to measure distances in the universe, as their periods of variability are directly related to their intrinsic luminosities. Overall, research on pulsating stars plays a crucial role in advancing our understanding of stellar evolution, the structure of galaxies, and the overall dynamics of the universe.