A Gamma Doradus variable is a type of pulsating star that exhibits changes in brightness due to oscillations in its outer layers. These stars are typically located in the constellation Dorado and are classified as late-type main-sequence stars. Their brightness variations occur over periods ranging from about 0.3 to 3 days. The changes in brightness are caused by pulsations that result from the star's internal processes, such as changes in temperature and pressure. Gamma Doradus variables are important for studying stellar structure and evolution, as they provide insights into the physical conditions within stars.