astronomical variables

Astronomical variables are stars or celestial objects that change in brightness over time. These variations can occur for different reasons, such as pulsations in the star’s outer layers, eruptions, or interactions with companion stars. For example, some stars periodically brighten and dim in predictable patterns, helping scientists understand stellar properties and distances. Others may vary unpredictably due to more chaotic processes. Studying these variables provides insights into stellar evolution, cosmic distances, and the dynamic universe. Essentially, variable stars are natural laboratories that reveal vital information about the life cycles and mechanics of celestial objects.